Climate and Weather of Seattle

The climate of Seattle

Seattle is located in the central west of the state of Washington and is the largest city in this state. Seattle is located in King County, on the estuary of Puget Sound and Lake Washington. Seattle is one of the most important seaport in the US. Shipping here is mainly focused on trade with Asia. The Space Needle is probably the city’s most famous building. This observation tower was built for the 1962 World’s Fair. From the Space Needle you have a view over the Olympic Mountains, the Cascade Range, Mount Rainier and Mount Baker. Seattle is also the birthplace of grunge. In the 1990s, bands such as Nirvana, Soundgarden, Alice in Chains and Pearl Jam became known for this Seattle-originated music genre.

Seattle’s temperate oceanic climate

According to itypeusa, Seattle has a temperate maritime climate (also called temperate maritime climate), with the most precipitation during the winter period. On an annual basis, the region receives quite a lot of precipitation, making this part of the US one of the wettest in the country. Winters are cool but pleasant, with the occasional chance of prolonged frost or night frost. During the coldest days, the precipitation will come down as snow. The summer months are on the mild side, with average temperatures below 25 degrees Celsius. The relatively cool seawater prevents the temperature from rising too far. Seattle’s mild climate contributes to the livability of the city. Because a place where the weather shows all kinds of extreme forms is not easy to live in.

A characteristic of Seattle’s climate is that the UV index rises to a maximum of 8 in the summer, but can also reach UV index 7 in fairly cloudy weather. It is therefore important to protect yourself well against the radiation when you are on holiday here in the summer. It is also striking that the number of days with precipitation can vary enormously if you use different criteria. If you assume a daily minimum of 0.1 millimeters, you will arrive at approximately 145 to 155 precipitation days per year for Seattle. If you use 0.01 mm as a lower limit, then you suddenly arrive at approximately 250 days with precipitation on an annual basis. This is mainly due to descending mist, which occurs mainly in the cooler months.

Climate figures

The figures below are based on long-term average climate statistics. The temperatures are displayed in degrees Celsius (°C).

maximum temperature minimum temperature hours of sunshine per day days of rainfall per month
January 7℃ 2℃ 2 18
February 10℃ 3℃ 4 15
March 12℃ 3℃ 5 16
April 14℃ 5℃ 7 14
May 18℃ 8℃ 8 11
June 21℃ 11℃ 9 9
July 23℃ 13℃ 10 5
August 23℃ 13℃ 9 6
September 20℃ 11℃ 7 9
October 16℃ 8℃ 5 13
November 11℃ 5℃ 2 18
December 8℃ 2℃ 2 19

The weather in Seattle

Here you will find the weather forecast for Seattle. View the current weather in Seattle and the forecast for the coming days, such as temperatures, the chance of precipitation, wind direction and wind strength. With this weather data you can see what kind of weather you can expect in Seattle. Based on the climate statistics, we describe the weather per month in Seattle. This is not a long-term forecast, but gives the average weather forecast for all months of the year. Do you want to see the detailed weather forecast for Seattle? On the page with extra weather information we show the chance of snow, the wind chill, visibility, UV strength, air pressure and more good weather information.An average weather picture per month can be compiled on the basis of long-term climate statistics, certain weather patterns and specific events.

January weather

In January, the average maximum temperature in Seattle is around 7 degrees Celsius. The average minimum temperature in January is 2 degrees. The number of hours that the sun is visible in January at this destination is around 2 hours per day. Within the whole month there is precipitation for about 18 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

February weather

In the month of February, the average maximum temperature in Seattle is around 10 degrees Celsius. The average minimum temperature in February is 3 degrees. The number of hours that the sun is visible in February at this destination is around 4 hours per day. Within the whole month there is rainfall for about 15 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

March weather

In the month of March, the average maximum temperature in Seattle is around 12 degrees Celsius. The average minimum temperature in March is 3 degrees. The number of hours that the sun is visible in March at this destination is around 5 hours per day. Within the whole month there is precipitation for about 16 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

The weather in April

In the month of April, the average maximum temperature in Seattle is around 14 degrees Celsius. The average minimum temperature in April is 5 degrees. The number of hours that the sun is visible in April at this destination is around 7 hours per day. Within the whole month there is precipitation for about 14 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

May weather

In the month of May, the average maximum temperature in Seattle is around 18 degrees Celsius. The average minimum temperature in May is 8 degrees. The number of hours that the sun is visible in May in this destination is around 8 hours per day. Within the whole month there is rainfall for about 11 days. If you look at the long-term averages, that means that there will not be much precipitation this month.

The weather in June

In the month of June, the average maximum temperature in Seattle is around 21 degrees Celsius. The average minimum temperature in June is 11 degrees. The number of hours that the sun is visible in June at this destination is around 9 hours per day. Within the whole month there is precipitation for about 9 days. If you look at the long-term averages, that means that there will not be much precipitation this month.

The weather in July

In July, the average maximum temperature in Seattle is around 23 degrees Celsius. The average minimum temperature in July is 13 degrees. The number of hours that the sun is visible in July at this destination is around 10 hours per day. Within the whole month there is precipitation for about 5 days. If you look at the long-term averages, this means little precipitation in this month.

The weather in August

In August, the average maximum temperature in Seattle is around 23 degrees Celsius. The average minimum temperature in August is 13 degrees. The number of hours that the sun is visible in August in this destination is around 9 hours per day. Within the whole month there is precipitation for about 6 days. If you look at the long-term averages, that means that there will not be much precipitation this month.

The weather in September

In September, the average maximum temperature in Seattle is around 20 degrees Celsius. The average minimum temperature in September is 11 degrees. The number of hours that the sun is visible in September at this destination is around 7 hours per day. Within the whole month there is precipitation for about 9 days. If you look at the long-term averages, that means that there will not be much precipitation this month.

The weather in October

In October, the average maximum temperature in Seattle is around 16 degrees Celsius. The average minimum temperature in October is 8 degrees. The number of hours that the sun is visible in October at this destination is around 5 hours per day. Within the whole month there is precipitation for about 13 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

The weather in November

In November, the average maximum temperature in Seattle is around 11 degrees Celsius. The average minimum temperature in November is 5 degrees. The number of hours that the sun is visible in November at this destination is around 2 hours per day. Within the whole month there is precipitation for about 18 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

December weather

In December, the average maximum temperature in Seattle is around 8 degrees Celsius. The average minimum temperature in December is 2 degrees. The number of hours that the sun is visible in December at this destination is around 2 hours per day. Within the entire month there is precipitation for about 19 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

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