Seattle, WA Weather by Month and Climate Averages

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 40 days, to August 5, 2025.

See where Seattle ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Washington.

Seattle weather by month

Seattle weather in January

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. The sun is out about 15% of daylight hours. 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. The sun is out about 24% of daylight hours. 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. The sun is out about 28% of daylight hours. 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. The sun is out about 35% of daylight hours. 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. The sun is out about 34% of daylight hours. 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. The sun is out about 41% of daylight hours. 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. The sun is out about 64% of daylight hours. 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. The sun is out about 56% of daylight hours. 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. The sun is out about 47% of daylight hours. 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. The sun is out about 36% of daylight hours. 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. The sun is out about 25% of daylight hours. 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. The sun is out about 18% of daylight hours. 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 sunshine about 64% of daylight hours. January is the cloudiest, at 15%. Over the year the sun shines about 35% of daylight hours. 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.

Thunderstorms occur on about 3 days a year.

See where Seattle ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

First and last freeze in Seattle

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

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 on record brought 4.0 in of rain, 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?

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 sunshine about 64% of daylight hours. 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.