Seattle
6 to 24°C
temperature
2749 hours
sunshine per day
78 mm
rain
291 days
dry
70 days
rain
4 days
snow

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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