Monthly normals · Rain · Snow Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Seattle, WA?
Seattle, WA gets 36.5 in of precipitation a year over about 153 rainy days. July is the warmest month (average high 77°F) and January the coldest (average low 37°F).
Station: SEATTLE BOEING FLD, 7 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1998–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Mediterranean climate
Seattle, WA has warm summers and chilly winters. Daytime highs range from about 47°F in December to 77°F in August. November is usually the wettest month. The most comfortable time to visit is typically May to September, when daytime highs sit near 72°F.
Season
Months
Avg low
Avg high
Winter
Dec–Feb
37°
49°
Spring
Mar–May
44°
60°
Summer
Jun–Aug
57°
75°
Autumn
Sep–Nov
47°
61°
How much rain does Seattle get?
Seattle gets 36.5 in of precipitation in an average year, spread over about 153 days with measurable rain. That is more rainy days than 95% of the US.
November is the wettest month, with 5.8 in. July is the driest, with 0.6 in. January has the most rainy days, about 19.
The longest dry spell in the last five years lasted 43 days, to August 28, 2026.
From September 2025 to August 2026 Seattle got 30.1 in of rain, against a normal of 36.5 in for those months. March 2026 had the most, with 5.6 in.
Monthly rainfall, September 2025 to August 2026, in inches. The dash on each month marks its 1991–2020 normal.
In January, Seattle averages a high of 48°F and a low of 37°F. It gets 5.2 in of precipitation over about 19 rainy days. Estimated sunshine is 15% of daylight hours, derived from ERA5 cloud cover. The January record high is 65°F (2015) and the record low is 14°F (2024).
Seattle weather in February
In February, Seattle averages a high of 50°F and a low of 37°F. It gets 3.7 in of precipitation over about 16 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The February record high is 72°F (2015) and the record low is 14°F (2019).
Seattle weather in March
In March, Seattle averages a high of 54°F and a low of 40°F. It gets 3.9 in of precipitation over about 18 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The March record high is 79°F (2019) and the record low is 23°F (2019).
Seattle weather in April
In April, Seattle averages a high of 59°F and a low of 44°F. It gets 2.9 in of precipitation over about 15 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The April record high is 89°F (2016) and the record low is 30°F (2008).
Seattle weather in May
In May, Seattle averages a high of 66°F and a low of 49°F. It gets 2.0 in of precipitation over about 11 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The May record high is 91°F (2023) and the record low is 32°F (1999). May is one of the most comfortable months to visit.
Seattle weather in June
In June, Seattle averages a high of 71°F and a low of 54°F. It gets 1.2 in of precipitation over about 9 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The June record high is 104°F (2021) and the record low is 43°F (2012). June is one of the most comfortable months to visit.
Seattle weather in July
In July, Seattle averages a high of 77°F and a low of 58°F. It gets 0.6 in of precipitation over about 3 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The July record high is 105°F (2009) and the record low is 49°F (1999). July is one of the most comfortable months to visit.
Seattle weather in August
In August, Seattle averages a high of 77°F and a low of 58°F. It gets 0.8 in of precipitation over about 4 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The August record high is 98°F (2020) and the record low is 49°F (2003). August is one of the most comfortable months to visit.
Seattle weather in September
In September, Seattle averages a high of 71°F and a low of 54°F. It gets 1.4 in of precipitation over about 8 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The September record high is 92°F (2025) and the record low is 40°F (1999). September is one of the most comfortable months to visit.
Seattle weather in October
In October, Seattle averages a high of 61°F and a low of 47°F. It gets 3.5 in of precipitation over about 15 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The October record high is 83°F (2022) and the record low is 27°F (2023).
Seattle weather in November
In November, Seattle averages a high of 53°F and a low of 40°F. It gets 5.8 in of precipitation over about 18 rainy days. Estimated sunshine is 25% of daylight hours, derived from ERA5 cloud cover. The November record high is 71°F (2016) and the record low is 14°F (2010).
Seattle weather in December
In December, Seattle averages a high of 47°F and a low of 37°F. It gets 5.5 in of precipitation over about 18 rainy days. Estimated sunshine is 18% of daylight hours, derived from ERA5 cloud cover. The December record high is 69°F (2014) and the record low is 14°F (2009).
Sunshine, humidity and wind in Seattle
July is the sunniest month in Seattle, with estimated sunshine of 64% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 15%. The annual cloud-cover estimate is 35% of daylight hours; it is not a measurement of sunshine duration. Seattle is cloudier than 96% of the US.
Humidity peaks in December at 85% and is lowest in July at 67%.
Wind averages 5 mph over the year, and March is the windiest month at 6 mph.
Seattle has about 4 days a year above 90°F. Seattle is cooler than 93% of the US.
The first fall freeze in Seattle typically comes around November 14, and the last spring freeze around March 17. That leaves a frost-free growing season of about 242 days.
Seattle weather records
These records cover SEATTLE BOEING FLD during 1998–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Seattle station is 105°F, on July 29, 2009. The coldest is 14°F, on December 10, 2009.
The wettest day in the available station history brought 4.0 in of precipitation, on October 20, 2003.
The best time to visit Seattle
The most comfortable time to visit is typically May to September, when daytime highs sit near 72°F.
Winter (December–February) is chilly, with average highs around 49°F and lows near 37°F.
Spring (March–May) is mild, with average highs around 60°F and lows near 44°F.
Summer (June–August) is warm, with average highs around 75°F and lows near 57°F. It can feel humid.
Autumn (September–November) is mild, with average highs around 61°F and lows near 47°F.
Seattle climate questions
How much rain does Seattle get?
Seattle gets 36.5 in of precipitation in an average year, over about 153 rainy days.
What is the wettest month in Seattle?
November is the wettest month in Seattle, with 5.8 in. July is the driest, with 0.6 in.
How many rainy days does Seattle have a year?
Seattle has about 153 days with measurable rain in an average year. January has the most, about 19.
What is the hottest month in Seattle?
July is the warmest month in Seattle, with an average high of 77°F.
What is the coldest month in Seattle?
January is the coldest month in Seattle, with an average low of 37°F.
What is the record high temperature in Seattle?
Within the available 1998–2026 station history, the record high at the Seattle station is 105°F, set on July 29, 2009. The record low is 14°F, on December 10, 2009.
What is the sunniest month in Seattle?
July is the sunniest month in Seattle, with estimated sunshine of 64% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in Seattle?
The first fall freeze in Seattle typically comes around November 14. The last spring freeze is around March 17.
What is the best time to visit Seattle?
The most comfortable time to visit is typically May to September, when daytime highs sit near 72°F.
