Oregon Weather By Month

January Weather in Oregon

Precipitation and Temperature Trends

January is one of the coldest months in Oregon, with a range of temperatures varying depending on the region. In general, the state’s coastal areas tend to be cooler and milder than its inland regions.

The average temperature in January ranges from around 37°F (3°C) along the coast to around 47°F (8°C) in the Willamette Valley, which is the state’s primary agricultural region. The Cascade Range and other mountainous areas tend to be colder, with temperatures often dipping below freezing.

When it comes to precipitation, January is typically one of the wettest months in Oregon. The coastal regions receive most of their annual rainfall during this time, with some areas receiving over 15 inches (38 cm) of precipitation in a single month. In contrast, inland areas tend to be drier, although they can still experience significant snowfall.

The state’s precipitation patterns are influenced by the proximity of the Pacific Ocean and the prevailing westerly winds that bring moisture from the sea. The coastal fog, also known as the “marine layer,” plays a key role in maintaining high levels of humidity along the coast, particularly during the winter months.

Temperature trends in Oregon’s January weather are characterized by cold snaps and periods of mild temperatures. Overnight lows can drop significantly below freezing, while daytime highs may occasionally reach into the 50s or even 60s (10-20°C). However, these warm spells are typically short-lived and followed by colder conditions.

The precipitation trends in January are more pronounced, with heavy rain showers and occasional thunderstorms affecting various parts of the state. The snowpack in the Cascade Range is usually at its peak during this time, providing valuable water storage for irrigation purposes during the summer months.

Overall, January weather in Oregon is marked by cold temperatures, significant precipitation, and varying conditions depending on the region. Understanding these trends can help residents and visitors prepare for and navigate the state’s diverse climate.

* January is one of the wettest months in Oregon with an average annual rainfall of around 1012 inches.

Oregon’s weather can be quite unpredictable, but one thing is certain – January marks the beginning of a wet and cool period in the state.

One of the key characteristics of January weather in Oregon is its wetness. The month typically sees a significant amount of rainfall, with an average annual total of around 1012 inches. This is one of the highest totals for any month in the state.

The majority of this precipitation comes from rain showers and occasional thunderstorms that move through the region. These storms can bring heavy downpours and strong winds, which can cause flash flooding and travel disruptions.

In addition to rain, Oregon also experiences some cooler temperatures during January. The average high temperature in the state’s coastal regions is around 47°F (8°C), while inland areas tend to be slightly warmer, with highs in the mid-50s (13-14°C).

Temperatures can fluctuate significantly throughout the day, especially in coastal areas where cold ocean air masses come ashore. Overnight lows can drop as low as 35°F (2°C), while daytime temperatures may rise into the mid-40s to low 50s (7-12°C).

The state’s interior regions tend to experience more extreme temperature fluctuations, with overnight lows sometimes dropping below freezing and daytime highs soaring into the 60s (16-21°C) or even warmer.

Despite these fluctuations, January is generally a cooler month in Oregon, especially when compared to the summer months. Skies can be partly cloudy, but sunshine is often limited due to the cloud cover associated with precipitation systems.

Some of the coldest temperatures in Oregon during January are typically recorded in the northeastern part of the state, where winter snows are not uncommon. This region tends to experience more continental air masses from Canada and can see significant snowfall events, especially at higher elevations.

Overall, January is a wet and cool month in Oregon, with temperatures ranging from mild to cold depending on the location within the state. The month’s weather patterns can vary significantly from year to year, but the wet conditions are a reliable constant during this time of year.

Predicting Precipitation:

• Oregon’s precipitation is typically at its highest in January, with an average annual total of around 1012 inches.
• The majority of this precipitation comes from rain showers and occasional thunderstorms that move through the region.

* Precipitation typically falls in the form of rain or snow, depending on elevation and location.

Oregon’s January weather is characterized by mild temperatures, especially near the coast, with moderate precipitation throughout the month.

The state’s coastal region experiences a significant amount of rainfall in January, often resulting from the frequent arrival of low-pressure systems and associated fronts that bring moist air from the Pacific Ocean.

Meanwhile, inland areas receive less rainfall but still experience some wet days. However, precipitation typically falls in the form of rain or snow, depending on elevation and location.

The Columbia River Gorge is an exception, where snowfall can occur even at low elevations due to its unique geography that funnels moist air from the ocean into the region.

January’s average high temperature ranges from around 47°F (8°C) along the coast to around 45°F (7°C) in the Willamette Valley and around 40°F (4°C) in eastern Oregon.

The corresponding low temperatures range from 39°F (4°C) along the coast to around 29°F (-2°C) in the mountains of central Oregon and lower than -10°F (-23°C) in some mountainous areas near Idaho.

January is one of the wettest months for many parts of Oregon, with some regions receiving over 12 inches (30 cm) of rainfall during the month. The average total precipitation statewide is around 7-8 inches (18-20 cm), but it can vary significantly depending on location and elevation.

The coastal areas tend to be the wettest, while inland areas are drier due to orographic effects that enhance rainfall near coastlines.

January snowfall varies greatly throughout the state, with some low-elevation areas receiving only minor snowfall. However, high elevations above 4,000 ft (1,219 m) can receive significant snowfall during January.

In summary, Oregon’s weather in January is characterized by mild temperatures near the coast, moderate to heavy precipitation throughout the state, and variable snowfall patterns depending on elevation.

* Average temperatures range from mid30s to low 40s Fahrenheit (25°C) along the coast and 40s to low 50s inland.

Oregon’s January weather is characterized by mild temperatures, with average lows and highs varying across different regions.

In coastal areas, such as Cannon Beach and Seaside, the average temperature ranges from mid-30s to low 40s Fahrenheit (2°C to 6°C). This is due to the moderating influence of the Pacific Ocean, which keeps temperatures relatively stable throughout the winter months.

Inland areas, including cities like Portland and Bend, experience slightly warmer temperatures, with average highs ranging from the mid-40s to low 50s Fahrenheit (7°C to 11°C). Overnight lows can still drop below freezing, especially in rural areas and at higher elevations.

The state’s diverse geography also means that different regions have varying precipitation patterns during January. The coastal area is generally wetter than inland areas, with average monthly rainfall totals ranging from 8-12 inches (20-30 cm). In contrast, inland areas receive significantly less precipitation, typically around 2-4 inches (5-10 cm) per month.

January is also the wettest month in Oregon, particularly in the western and central regions. The Cascade Range acts as a rain shadow, resulting in drier conditions east of the mountains. The eastern part of the state tends to receive more snowfall during this time, especially at higher elevations.

Fog is another notable feature of January weather in coastal Oregon. The combination of cool ocean temperatures and moist air can lead to foggy conditions along the coast, often lasting into the morning hours.

Winter storms can also impact the state during January, bringing heavy precipitation, strong winds, and potential power outages. These events are more common in coastal areas but can affect inland regions as well.

In summary, Oregon’s January weather is characterized by mild temperatures, high levels of rainfall, and varying snowfall totals depending on region. Residents and visitors alike should be prepared for potentially wet and stormy conditions throughout the month.

Summer Weather in Oregon (June-August)

Precipitation Patterns and Temperature Extremes

Oregon’s summer weather, spanning from June to August, is characterized by mild temperatures, with a gradual warming trend as the season progresses.

The state’s coastal regions experience a maritime climate, resulting in cooler temperatures and higher humidity levels compared to inland areas.

June typically marks the beginning of summer, with average high temperatures ranging from 70°F (21°C) in the northwestern part of the state to 85°F (29°C) in the southeastern region.

The summer months are also characterized by increased precipitation due to the warm and moist air from the Pacific Ocean. The western slope of the Cascade Range, which includes major cities such as Portland and Eugene, tends to receive most of its annual rainfall during this period.

Here’s a breakdown of average monthly precipitation patterns in Oregon during the summer:

• June: Western slope 2-3 inches (5-7.5 cm), Eastern slope 1 inch (2.5 cm)

• July: Western slope 2-4 inches (5-10 cm), Eastern slope 1-2 inches (2.5-5 cm)

• August: Western slope 3-4 inches (7.5-10 cm), Eastern slope 2-3 inches (5-7.5 cm)

Temperature extremes during the summer months are relatively rare in Oregon, but occasional heatwaves can occur.

The hottest temperature ever recorded in Oregon was 117°F (47.2°C) on June 29, 1898, in the city of Pendleton.

On the other hand, temperatures below freezing have been reported during the summer months in some parts of the state, especially at higher elevations.

The following are average temperature ranges for selected cities in Oregon during the summer:

City	June Avg High (°F)	July Avg High (°F)	August Avg High (°F)
Portland	78	82	83
Eugene	85	89	90
Salem	82	86	88

Overall, Oregon’s summer weather is characterized by mild temperatures and moderate precipitation levels.

* Summer months experience an average annual rainfall of around 12 inches, with some areas receiving little to no precipitation.

Oregon’s summer weather, spanning from June to August, is characterized by warm temperatures and relatively dry conditions. The state experiences a Mediterranean climate, with most of its rainfall occurring during the winter months.

During this period, the average high temperature in Oregon ranges from the mid-70s to the mid-80s Fahrenheit (23-30°C), while overnight lows typically range from the mid-50s to the low 60s Fahrenheit (13-18°C). The temperature difference between day and night is significant, making it essential to pack layers for your visit.

One of the most notable aspects of Oregon’s summer weather is its dryness. Summer months experience an average annual rainfall of around 12 inches, with some areas receiving little to no precipitation. This dry spell can lead to an increased risk of wildfires, particularly in the eastern part of the state.

The sun shines brightly during Oregon’s summer, with an average of 9-10 hours of direct sunlight per day. However, the state’s coastal regions tend to experience more overcast conditions due to the marine layer that frequently moves in from the Pacific Ocean.

Summer is also a peak tourist season in Oregon, drawing visitors who want to enjoy outdoor activities like hiking, biking, and water sports on Lake Oswego, Willamette River, and other bodies of water. The scenic drives along the Oregon Coast Highway (US-101) are breathtaking during this time.

As the summer months progress, temperatures begin to rise, especially in the interior regions. By late August, daytime highs can reach into the mid-90s Fahrenheit (35-37°C), while nighttime lows may dip only slightly.

In summary, Oregon’s summer weather is characterized by mild temperatures, moderate humidity, and plenty of sunshine. While it’s not unusual to experience occasional heatwaves during this period, the dry conditions and relatively low precipitation make it an ideal time for outdoor enthusiasts to enjoy the state’s natural beauty.

* Dry spells can last for weeks, but intense thunderstorms are possible during the late afternoon and evening hours.

Summer weather in Oregon, spanning from June to August, brings a mix of warm temperatures, dry spells, and occasional intense thunderstorms.

June marks the beginning of summer in Oregon, with daytime temperatures gradually warming up to the mid-70s to low 80s Fahrenheit (23-27°C), while nighttime temperatures remain cool, ranging from the mid-50s to low 60s Fahrenheit (13-18°C).

Dry spells can last for weeks during this period, with an average of 12 days between precipitation events in June, according to climate data. However, these dry periods often give way to intense thunderstorms that develop during the late afternoon and evening hours.

July is typically the warmest month in Oregon, with daytime temperatures frequently reaching the mid-80s Fahrenheit (29-30°C) and sometimes exceeding 90°F (32°C). Nights remain relatively mild, averaging in the mid-to-upper 60s Fahrenheit (18-21°C).

The dry spell situation persists into August, though storms become less frequent and intense compared to June. Temperatures often peak during this period, with highs reaching the low 90s Fahrenheit (32-34°C) and lows dipping into the mid-to-high 60s Fahrenheit (16-20°C). However, it’s not uncommon for temperature fluctuations to occur.

During these summer months, Oregon experiences its most significant temperature differences between day and night. It is crucial to be aware of these variations when planning outdoor activities or packing clothing and accessories accordingly.

While the dry spells can be quite lengthy in duration, they are often punctuated by thunderstorms during the late afternoon and evening hours. These storms may bring heavy rain showers, strong gusts, and sometimes even hail. As a result, it is always wise to monitor local weather forecasts before heading outside during these periods.

* Temperatures typically range from mid60s to low 70s Fahrenheit (1822°C) along the coast and high 70s to low 80s inland.

The summer months in Oregon, which span from June to August, bring a pleasant climate with mild temperatures and moderate humidity.

During this period, the temperatures typically range from mid-60s to low 70s Fahrenheit (18-22°C) along the coast, while inland areas experience high 70s to low 80s (23-27°C).

The coastal regions of Oregon tend to be cooler and more prone to fog due to the presence of the Pacific Ocean. This cooler climate is particularly evident in the early mornings and late evenings during the summer months.

In contrast, the inland areas of Oregon are generally warmer than their coastal counterparts. These regions experience a drier and sunnier climate, making them ideal for outdoor activities like hiking, camping, and water sports.

Summer Weather Patterns in Oregon

The summer weather patterns in Oregon can be characterized by:

• A high pressure system that dominates the region during the summer months, bringing clear skies and light winds.

• Low pressure systems that occasionally move into the region, resulting in cooler temperatures and increased cloud cover.

• A slight chance of thunderstorms, particularly in the eastern part of the state where moisture from the desert climate meets the drier air from the west.

Regional Variations

Oregon’s diverse geography and coastal-inland divide result in varying weather patterns across different regions:

• The Willamette Valley, which includes the cities of Portland and Salem, experiences a moderate climate with warm summers and cool winters.

• The Cascades, including Mount Hood and the Oregon Coast Range, tend to be cooler and wetter than other parts of the state.

• The Eastern part of Oregon, which includes cities like Pendleton and Ontario, has a drier climate with cold winters and hot summers.

Weather Forecasting in Summer

During the summer months, weather forecasting plays an essential role in helping individuals plan their activities and prepare for potential weather events. It is not uncommon to see temperature fluctuations of up to 10-15°F (5-8°C) within a single day.

As such, it’s crucial to stay informed about current and future weather conditions by checking local news and weather reports, as well as using mobile apps that provide real-time updates on temperature, humidity, wind speed, and other relevant factors.

Winter Storms in Oregon

Average Snowfall and Impacts on Transportation

Oregon’s Pacific Northwest climate means that winters are generally mild compared to other parts of the country, but winter storms can still bring significant snowfall and disrupt transportation.

The state’s mountainous regions receive the most significant amount of precipitation during the winter months, with the Cascade Range receiving an average annual snowfall of around 300-400 inches in some areas.

However, it is worth noting that average snowfall amounts vary widely across Oregon, with the western and coastal regions typically receiving less than 10 inches per year.

The Columbia River Gorge and eastern parts of the state receive moderate to heavy snowfall, averaging around 20-30 inches annually.

Winter storms in Oregon can have a significant impact on transportation, particularly during periods of intense snowfall or when roads are not adequately cleared.

Road conditions can deteriorate quickly, making it difficult for drivers to navigate and increasing the risk of accidents.

The Oregon Department of Transportation (ODOT) works hard to keep roads clear, but significant winter storms can still cause delays and closures on major highways, including Interstate 84 and US Highway 26.

Other transportation systems, such as public transit and Amtrak services, may also be disrupted during periods of heavy snowfall.

The effects of winter storms can also extend to other areas of Oregon’s infrastructure, such as power lines and communication networks.

Residents are urged to stay informed about weather conditions through local news outlets and emergency alert systems.

Travelers should plan ahead, check road conditions before embarking on a journey, and consider alternative routes or modes of transportation when possible.

The Oregon Department of Transportation also provides a Winter Driving Guide with tips and resources for safe driving in winter conditions.

Oregon’s Office of Emergency Management works closely with local authorities to prepare for and respond to winter storms, but residents are ultimately responsible for their own safety during extreme weather events.

* Western Oregon’s snowfall is relatively rare, with most areas receiving less than a foot of snow per year.

When it comes to Winter Storms in Oregon, the state’s weather patterns are influenced by its location on the Pacific coast and its mountainous terrain.

The state can be divided into two main regions: Western Oregon and Eastern Oregon. While both regions experience their share of winter storms, the nature and severity of these storms differ significantly.

Western Oregon, which includes the cities of Portland and Eugene, typically sees a relatively mild climate with cool winters. However, snowfall in this region is rare and often limited to short-lived events that bring less than 6 inches (15 cm) of accumulation.

Western Oregon Snowfall: Averages by City

• Portland, OR:

  • Average annual snowfall: 4.3 inches (11 cm)
  • Most snow in one year: 20.2 inches (51 cm) in 1968-1969

• Eugene, OR:

  • Average annual snowfall: 2.7 inches (7 cm)
  • Most snow in one year: 23.4 inches (59 cm) in 1950-1951

In contrast, Eastern Oregon is more prone to significant snowfall due to its inland location and higher elevation. Cities like Pendleton and La Grande often experience heavier snowstorms that can dump several feet of snow over a short period.

Eastern Oregon Snowfall: Averages by City

• Pendleton, OR:

  • Average annual snowfall: 35.4 inches (90 cm)
  • Most snow in one year: 114.5 inches (291 cm) in 1968-1969

• La Grande, OR:

  • Average annual snowfall: 43.1 inches (109 cm)
  • Most snow in one year: 118.5 inches (301 cm) in 1950-1951

Overall, while Western Oregon’s snowfall is relatively rare and limited to short-lived events, Eastern Oregon experiences more significant snowfall due to its inland location and higher elevation.

It’s essential to note that even in areas where snow is less common, winter storms can still cause hazardous road conditions, power outages, and disruptions to daily life. If you live in or plan to visit Oregon during the winter months, be prepared for possible weather-related challenges and stay informed about local weather forecasts and alerts.

* Eastern Oregon’s mountains receive significant snowfall, often exceeding 20 feet annually.

Oregon is known for its mild climate, but during the winter months, it’s not uncommon for the state to be affected by winter storms.

These storms can bring heavy snowfall, high winds, and low visibility, making travel difficult and posing a threat to people’s safety.

Easter Oregon’s mountains receive significant snowfall, often exceeding 20 feet annually. In fact, some mountain peaks in the state can see over 50 feet of snow in a single year, making them among the snowiest places in the country.

The heavy snowfall is due to the region’s geography, with the Cascade Range and other mountainous regions forcing warm, moist air to rise, cool, and condense, resulting in precipitation.

In addition to the mountains, winter storms can also bring significant snowfall to the Willamette Valley, which can be a surprise for people living in this region who are not used to seeing large amounts of snow.

Winter storms can also lead to power outages and disruptions to daily life, especially if the storm is severe enough to cause widespread damage to infrastructure.

The National Weather Service issues winter weather alerts and warnings when a storm is forecasted to bring significant snowfall or other hazardous conditions. It’s essential for people to stay informed about the latest weather forecast and sign up for emergency alerts from their local government.

When a winter storm hits, it’s crucial to take precautions to ensure your safety and the safety of others. This includes staying indoors, keeping an eye on vulnerable neighbors, and being prepared for power outages by having flashlights, batteries, and other essential supplies on hand.

Additionally, if you need to travel during a winter storm, make sure to check road conditions before heading out and consider postponing your trip until the weather improves.

In summary, winter storms in Oregon can be intense and pose significant challenges for people living in the state. It’s essential to stay informed, take precautions, and be prepared for these events to ensure your safety and the safety of others.

* Winter storms can impact transportation, causing delays and closures along major highways and interstates.

Oregon is no stranger to winter storms, which can bring significant precipitation and strong winds to the state.

The Pacific Ocean has a moderating effect on Oregon’s climate, but during the winter months, cold air from Alaska and Canada can push into the region, leading to significant snowfall and freezing temperatures.

Winter storms in Oregon are typically most active between December and February, with January being the wettest month of the year, averaging over 6 inches (15 cm) of precipitation statewide.

The state’s highest elevations can receive heavy snowfall during these months, with some areas seeing upwards of 10-20 feet (3-6 meters) or more of snow in a single season.

The Cascade Range is particularly prone to heavy snowfall, with the higher peaks receiving significant snowpack that can last well into the spring and summer months.

The coastal regions tend to receive less snow than the interior, but can still experience strong winds, heavy rain, and rough seas during winter storms.

The impact of winter storms on transportation in Oregon can be significant, with major highways and interstates often experiencing delays or closures due to snow-covered roads and icy conditions.

The state’s mountain passes, such as the Siskiyou Summit and the Cascade Tunnel, are particularly susceptible to closure during severe winter weather events.

Some of the most impacted areas include:

• I-5, which runs along the I-5 corridor from Portland to Medford, is often affected by winter storms, with closures common during severe weather events
• US-26, also known as the Historic Columbia River Highway, is a scenic route that can be closed due to snow and ice in the Cascade Range
• OR-20, which runs through the Siskiyou Mountains, can experience closures during severe winter weather events

Residents of Oregon should be prepared for winter storms by stocking up on supplies, such as food, water, and medications, in case they are unable to leave their homes.

The state’s emergency management officials urge residents to stay informed about winter storm conditions through local news outlets and the National Weather Service’s website