Patrick Green
January Weather in Washington
Average Temperatures and Precipitation
The month of January is one of the coolest months in Washington, with temperatures gradually decreasing as winter progresses.
Average high temperatures in Washington during January typically range from 43°F (6°C) in the coastal areas to around 48°F (9°C) in the inland regions.
On average, the lowest temperature in January can drop to around 34°F (1°C) along the coast and as low as 28°F (-2°C) in the central and eastern parts of the state.
The overall average temperature for the month is generally in the mid-30s (3-5°C), with an average annual temperature range from around 35°F (2°C) to 45°F (7°C).
January is also one of the wettest months in Washington, with significant precipitation expected throughout the state.
The coastal regions typically receive an average of 12-18 inches (30-46 cm) of precipitation during January, while inland areas tend to see slightly less, around 9-14 inches (23-36 cm).
January is also a relatively cloudy month in Washington, with an average of around 70% cloud cover.
The snowfall is typically moderate during January, especially at higher elevations and in the mountainous regions of Washington.
Mountain passes often see significant snow accumulation during January, sometimes reaching depths over 10-15 feet (3-4.5 meters).
Average snowfall for the month varies by region, with the Olympic Peninsula typically seeing around 2-6 inches (5-15 cm) of snow, while other parts of the state see significantly more.
Temperatures range from 35°F (2°C) to 47°F (8°C).
In January, Washington state experiences a mild winter climate with temperatures ranging from 35°F (2°C) to 47°F (8°C). The average temperature throughout the month is around 41°F (5°C), making it one of the mildest winter months in the region.
Daytime temperatures usually hover around 43°F (6°C) while nighttime temperatures can drop as low as 35°F (2°C), indicating a moderate coolness. However, this temperature range allows for a comfortable climate ideal for various outdoor activities during January.
Washington’s proximity to the Pacific Ocean also influences its weather patterns, resulting in relatively mild and stable temperatures throughout the month. Although there may be occasional cold snaps or warmer periods, the overall trend remains consistent with a moderate winter climate.
It is worth noting that while snowfall during January can occur, especially in the Cascade Range and Olympic Mountains, it rarely affects the lower-lying areas of Washington state. The average precipitation throughout the month varies across different parts of the region but typically ranges between 3-4 inches (7.5-10 cm).
Overall, January offers pleasant winter conditions for residents and tourists alike in Washington state. With mild temperatures and low snowfall risks in lower elevations, it’s an ideal time to explore the region without the intense cold associated with more northern parts of the United States.
Precipitation totals around 45 inches (1013 cm), with most of it falling as rain.
The state of Washington experiences a temperate climate with significant precipitation throughout the year, and January is no exception.
In January, Washington receives an average of 45 inches (113 cm) of precipitation, with most of it falling as rain rather than snow.
Monthly Precipitation Totals in Inches
- January: 14.9
- February: 12.8
- March: 11.4
- April: 10.6
- May: 7.8
- June: 5.9
- July: 3.7
- August: 2.8
- September: 4.1
- October: 6.4
- November: 11.1
While precipitation is common throughout the state, the frequency and intensity of rain vary depending on the region.
Different Regions’ Precipitation Patterns in January
- The Olympic Peninsula experiences a higher level of precipitation than other parts of the state, with an average of 22.5 inches (57 cm) in January.
- The Puget Sound region receives around 15-16 inches (38-41 cm), while the Cascade Mountains receive about 12-14 inches (30-36 cm).
The cooler temperatures and increased moisture create ideal conditions for plants to grow, but it also makes the roads slippery.
The National Oceanic and Atmospheric Administration (NOAA) notes that January is typically a wet month in the Pacific Northwest.
The National Oceanic and Atmospheric Administration (NOAA) notes that January is typically a wet month in the Pacific Northwest, with significant precipitation throughout the region.
The average temperature in January ranges from 37°F to 47°F (3°C to 8°C), making it one of the cooler months of the year in Washington state.
The mountainous regions of Washington, such as the Olympic and Cascade Mountains, tend to be colder than the lower-lying areas, with average temperatures ranging from 25°F to 35°F (-4°C to 2°C) near sea level.
Some areas receive significant snowfall in January, particularly at higher elevations. The Olympic Peninsula and Mount Rainier are known for receiving heavy snowfall during this time of year.
In terms of precipitation, the western part of Washington state tends to be wetter than the eastern part, with an average of 5-7 inches (13-18 cm) of precipitation in Seattle, compared to 2-4 inches (5-10 cm) in Spokane.
The wettest month on record for Seattle was January 1996, which received over 12 inches (30 cm) of precipitation.
It’s worth noting that while January is a wet month in Washington state, it’s not uncommon to experience some dry spells during the month. Temperatures can also be quite variable, with cold snaps and warm fronts moving through the region.
Frequency of Precipitation by Month
- January: 22-23 days with precipitation (average)
- February: 20-21 days with precipitation (average)
- March: 18-19 days with precipitation (average)
Summer Weather (June, July, August)
Warm Temperatures and High Humidity
Summer weather in Washington typically peaks during the months of June, July, and August, with warm temperatures and high humidity being characteristic of this season.
The first month of summer, June, brings a gradual warming trend to the region, with average high temperatures ranging from the mid-70s to mid-80s Fahrenheit (23-30°C) across the state.
As July arrives, Washington enters its warmest period, with average highs frequently reaching into the 90s Fahrenheit (32-38°C), especially in inland areas and during heatwaves.
The hottest month of the summer is often August, which typically sees temperatures soar to near-record levels, particularly along the Columbia River Gorge and in valleys where the sun’s rays are intensified by surrounding terrain.
During this time, Washington’s cities experience a high humidity due to the warm air masses from the Pacific Ocean moving inland, creating an uncomfortable feel of stickiness that can be oppressive on hot summer days.
The heat index, which takes into account both temperature and humidity, often rises above 100°F (38°C) in the state’s urban areas, making it seem even more sweltering than actual temperatures might suggest.
Heatwaves, fueled by high-pressure systems that bring clear skies and a lack of rain, are common occurrences during this time. These prolonged periods of hot weather can be particularly challenging for people, especially those who don’t have access to air conditioning or cooling systems.
The summer season is also marked by an increased risk of heat-related illnesses, such as heat exhaustion and heat stroke, which can be life-threatening if left untreated.
While some parts of the state receive occasional relief from thunderstorms, bringing cooler temperatures and welcome rain, these events are relatively rare during the peak summer months in Washington.
In general, residents and visitors alike should take precautions to stay cool and hydrated when spending time outdoors during this period, such as staying indoors during the hottest part of the day and drinking plenty of water to avoid heat exhaustion.
Summer months experience warm temperatures, averaging 73°F (23°C).
The summer season in Washington typically spans from June to August, with temperatures gradually warming up as the months progress.
The month of June often marks the beginning of the warmest time of year in Washington, with average high temperatures ranging from the mid-70s to low 80s Fahrenheit (23°C to 28°C).
As summer settles in during July, the heat becomes more pronounced, with day-time highs frequently reaching the upper 80s and lower 90s Fahrenheit (29°C to 32°C).
The peak of the summer months is often associated with August, when temperatures tend to be at their warmest, with average high temperatures typically reaching the mid-90s Fahrenheit (35°C) on occasion.
It’s worth noting that while these are general temperature patterns for each month during the summer season in Washington, individual days can vary significantly from one year to another.
In terms of precipitation, summer months usually experience relatively low levels, with most areas averaging less than 1 inch (25 mm) per month, although some years may be wetter or drier than others.
Humidity levels can be high, especially near the ocean.
During the summer months in Washington, which include June, July, and August, the weather is typically hot and humid, with temperatures often reaching into the mid-80s to low 90s (Fahrenheit) during the day.
The heat index can make it feel even hotter, especially near the ocean where humidity levels are higher due to the proximity of large bodies of water. On a typical summer day in Washington, you can expect temperatures to range from the mid-60s to mid-80s (Fahrenheit) across different regions.
June marks the beginning of summer in Washington and brings with it warm days and cooler nights. The temperature gradually warms up throughout the month, reaching its peak by the end of June. On average, high temperatures during this period are around 75 to 85 degrees Fahrenheit (24-29 degrees Celsius) near the coast, while inland areas can reach highs in the mid-80s (29-32 degrees Celsius).
July is usually the warmest month in Washington, with an average high temperature ranging from 76 to 90 degrees Fahrenheit (24-32 degrees Celsius) across different regions. Overnight temperatures may dip into the low 60s (18-20 degrees Celsius), especially near the ocean where humidity levels are higher.
August is similar to July, with warm days and cool nights. While it’s not as hot as July, temperatures remain pleasant for outdoor activities, with average highs ranging from 74 to 88 degrees Fahrenheit (23-31 degrees Celsius). Overnight temperatures can still dip into the low 60s (18-20 degrees Celsius).
While summer weather in Washington is generally warm and sunny, it’s not uncommon for heatwaves to occur during this time of year. When they do, temperatures can soar into the high 90s or even triple digits (Fahrenheit) for short periods.
Another factor that affects summer weather in Washington is humidity levels. The state’s proximity to large bodies of water, such as Puget Sound and the Pacific Ocean, contributes to higher humidity levels near the coast. Inland areas tend to be drier than coastal regions but can still experience warm temperatures during the summer months.
When planning outdoor activities in Washington during the summer, it’s essential to take into account temperature and humidity levels. While the state experiences some of its best weather conditions during this time of year, it’s crucial to stay hydrated, wear light clothing, and plan for periods of intense heat or higher humidity.
In summary, while summer weather in Washington can be warm and sunny, with high temperatures reaching into the mid-80s to low 90s (Fahrenheit), humidity levels can make it feel even hotter, especially near the ocean. It’s essential to stay informed about local weather conditions, plan accordingly, and prioritize your safety during this time of year.
The University of Washington notes that summer storms are common during this time, bringing heavy precipitation.
The summer months in Washington state, spanning from June to August, bring a unique set of weather conditions that are characterized by hot and dry temperatures during the day, but also by sudden and intense storms.
June is often considered the start of the summer season in Washington, with warm temperatures and long days. However, it’s not uncommon for the state to experience occasional rain showers and thunderstorms during this time. These storms can bring heavy precipitation, causing flash flooding in some areas.
July is usually the hottest month of the year in Washington, with average high temperatures ranging from the mid-70s to the mid-80s (°F) across different regions. However, as noted by the University of Washington, summer storms are common during this time, bringing heavy precipitation and sometimes even thunderstorms.
August is another hot and dry month in Washington, but it’s also a time when the state experiences its fair share of summer storms. These storms can be intense, with heavy rain, strong winds, and even hail in some cases.
The frequency and severity of summer storms in Washington are influenced by various factors, including atmospheric conditions, topography, and ocean currents. The state’s location near the Pacific Ocean also plays a significant role in shaping its weather patterns during the summer months.
Residents and visitors alike should be aware of the potential for sudden changes in the weather during the summer months in Washington. This means checking local forecasts regularly, being prepared for unexpected rain showers or thunderstorms, and taking necessary precautions to ensure safety.
In addition to preparing for summer storms, it’s also essential to take steps to conserve water and reduce flood risk in areas prone to flash flooding. This can include implementing flood-control measures, such as storm drains and retention ponds, and promoting practices that help to absorb excess rainwater.
Overall, while the summer months bring a welcome respite from the cooler winter weather in Washington, it’s essential to be prepared for the potential risks associated with intense storms. By staying informed, taking necessary precautions, and working together as a community, we can mitigate these risks and ensure a safer and more enjoyable experience for everyone.
Fall Weather (September, October, November)
Mild Temperatures and Light Precipitation
As we approach the final months of the year, Washington’s weather begins to transition from the warmth of summer to the cooler temperatures of fall. September is a transitional month, with mild temperatures and light precipitation characterizing its climate.
The average high temperature in September reaches around 73°F (23°C), while the average low temperature dips to around 51°F (11°C). These conditions make it an ideal time for outdoor activities, such as hiking, biking, or simply enjoying a picnic in a park.
Rainfall in September is relatively scarce, with an average of just over 3 inches (76 mm) throughout the month. This dry spell makes it an excellent time for gardening and outdoor maintenance tasks that require less water.
As we move into October, the temperatures continue to cool down, but the mild conditions persist. The average high temperature drops to around 68°F (20°C), while the average low temperature falls to approximately 45°F (7°C).
The precipitation pattern in October remains light, with an average of about 3.5 inches (89 mm) of rainfall throughout the month. This makes it a great time for outdoor activities, such as apple picking or visiting pumpkin patches.
November marks the beginning of winter in Washington, but the weather is still relatively mild compared to the colder months. The average high temperature reaches around 54°F (12°C), while the average low temperature falls to about 38°F (3°C).
The precipitation pattern in November remains light, with an average of approximately 4 inches (102 mm) of rainfall throughout the month. While it’s not uncommon for some areas to experience a bit more rain than others, the overall mild conditions make it an excellent time for outdoor activities.
Temperatures range from 45°F (7°C) to 58°F (14°C).
Fall weather in Washington, which spans from September to November, brings a mix of comfortable and crisp temperatures, perfect for outdoor activities.
The months of September, October, and November offer a range of temperature variations, but generally, the temperature ranges from 45°F (7°C) to 58°F (14°C).
Temperature Ranges by Month
- September: Average highs are around 73°F (23°C), while average lows range from 51°F (11°C) to 59°F (15°C).
- October: Temperatures start to cool down, with average highs around 64°F (18°C) and average lows ranging from 45°F (7°C) to 52°F (11°C).
- November: This month is usually the coolest of the three, with average highs around 51°F (11°C) and average lows ranging from 39°F (4°C) to 46°F (8°C).
In addition to temperature fluctuations, fall weather in Washington also brings a significant amount of rainfall, especially during November.
Rainfall Patterns
- September: Expect an average of 3-4 inches (76-102 mm) of precipitation throughout the month.
- October: Rainfall increases to around 5-6 inches (127-152 mm), making it one of the wettest months of the year in Washington.
- November: This is typically the wettest month, with an average of 7-8 inches (178-203 mm) of precipitation.
Dry spells can occur, but overall, fall weather in Washington is characterized by a gentle and soothing climate that makes it perfect for outdoor enthusiasts to enjoy nature’s splendor.
Precipitation is generally light, totaling around 45 inches (1013 cm) per month.
Fall weather in Washington State, spanning from September to November, brings a mix of mild temperatures and moderate precipitation.
The month of September is characterized by pleasant autumnal conditions, with average high temperatures ranging between 68°F (20°C) and 57°F (14°C). The overnight lows during this period can dip as low as 48°F (9°C).
September’s precipitation totals around 2.5 inches (64 mm), which is relatively light compared to other months in the region.
October is another month of mild fall weather, with average high temperatures ranging between 63°F (17°C) and 50°F (10°C). The overnight lows can drop as low as 43°F (6°C).
The precipitation in October averages around 2.7 inches (69 mm), with most of it falling towards the end of the month.
November marks the beginning of winter, but fall weather still prevails in Washington State during this period. The average high temperatures range between 51°F (11°C) and 42°F (6°C).
The overnight lows can drop as low as 38°F (3°C), while precipitation totals around 4 inches (102 mm), which is relatively moderate compared to other months.
The USDA notes that autumn foliage in Washington is often at its best during this time period.
Fall weather in Washington, which spans from September to November, brings a mix of mild and cool temperatures, along with the changing foliage that makes this season so picturesque.
During September, the average high temperature ranges from 73°F (23°C) in the north to 78°F (26°C) in the south. However, as the month progresses, nighttime temperatures can drop significantly, especially towards the end of the month when it’s not uncommon for temperatures to dip into the mid-40s (7-9°C).
As October begins, the days start getting shorter, and the temperatures begin to cool down further. The average high temperature in late October is around 63°F (17°C), while the overnight lows can drop to around 45°F (7°C) or lower.
By November, autumn foliage reaches its peak in Washington, with many trees displaying vibrant shades of red, orange, and yellow. The average high temperature during this time ranges from 54°F (12°C) in the north to 59°F (15°C) in the south, while overnight lows can drop to around 38°F (3°C) or lower.
Another key aspect of fall weather in Washington is precipitation. While September and October tend to be relatively dry months, November sees a noticeable increase in rainfall. The region averages around 2-3 inches (5-7.6 cm) of precipitation per month during this time period, with some areas receiving significantly more.
Here are some specific temperature ranges for Washington cities during the fall season:
Seattle:
- September: highs around 73°F (23°C), lows around 57°F (14°C)
- October: highs around 64°F (18°C), lows around 49°F (9°C)
- November: highs around 55°F (13°C), lows around 43°F (6°C)
Tacoma:
- September: highs around 75°F (24°C), lows around 58°F (14°C)
- October: highs around 66°F (19°C), lows around 50°F (10°C)
- November: highs around 57°F (14°C), lows around 44°F (6°C)
Spokane:
- September: highs around 73°F (23°C), lows around 52°F (11°C)
- October: highs around 62°F (17°C), lows around 45°F (7°C)
- November: highs around 54°F (12°C), lows around 40°F (4°C)
Overall, fall weather in Washington offers a unique blend of comfortable temperatures and vibrant foliage that makes it an attractive destination for tourists and locals alike.
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