Climate of Seattle
Seattle has a mediterranean climate. The summers are warm and dry, and the temperature is cold in the winter. The average annual temperature for Seattle is 29° degrees and there is about 31 inch of rain in a year. It is dry for 255 days a year with an average humidity of 79% and an UV-index of 3.
Climate averages for the whole year
- Day: the average daily temperature during the day is between 6°C and 24°C
- Night:the average nighttime temperature is between 2°C and 12°C
- Sea temperature: the sea temperature is between 3°C and 20°C
- Rain: it rains 70 days and there is a total of approximately 78 mm rainfall
- Snow: it snows an average of 4 days per year
- Sun hours: throughout the year there are 2749 sun hours
Maximum temperature: | between 6°C and 24°C |
Warmest month: | 24°C in July |
Coldest month: | 6°C in December |
Night temperature: | between 2°C and 12°C |
Sea temperature: | between 3°C and 20°C |
Dry days: | 291 days |
Days with rain: | 70 days |
Days with snow: | 4 days |
Total rain sum: | 78 mm |
Hours of sunshine: | 2749 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for Seattle.
Precipitation graph
This graph shows the average amount of rainfall per month for Seattle.
Climate table of Seattle
In this climate table you can see at a glance what the average weather per month is for Seattle. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Seattle might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°F) | 45 | 46 | 51 | 55 | 63 | 68 | 75 | 76 | 70 | 59 | 49 | 43 |
Night temp. (°F) | 36 | 35 | 37 | 40 | 44 | 48 | 52 | 53 | 50 | 45 | 40 | 35 |
Water temp. (°F) | 46 | 38 | 38 | 47 | 62 | 68 | 66 | 66 | 60 | 55 | 51 | 48 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (inch) | 3 | 4 | 2 | 1 | 1 | 1 | 0 | 1 | 1 | 4 | 6 | 6 |
Days with rain | 7 | 7 | 8 | 6 | 5 | 4 | 3 | 2 | 5 | 7 | 9 | 7 |
Days with snow | 1 | 2 | - | - | - | - | - | - | - | - | - | 1 |
Dry days | 23 | 19 | 23 | 24 | 26 | 26 | 28 | 29 | 25 | 24 | 21 | 23 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 5 | 5 | 6 | 9 | 10 | 10 | 11 | 11 | 10 | 6 | 4 | 4 |
Wind force (Bft) | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 |
UV-index | 2 | 2 | 3 | 3 | 4 | 5 | 5 | 4 | 4 | 3 | 2 | 2 |
Best time to visit Seattle
The best time to visit Seattle in the state of Washington is from May through September. In this period you have a pleasant temperature and almost no precipitation. The highest average temperature in Seattle is 76°F in August and the lowest is 43°F in December. The highest water temperature is 68°F and at its coldest the water is 38°F.
Climate of Seattle by month
What is the average climate in a given month for Seattle? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
Seattle weather experiences
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