Climate of SeaTac
SeaTac has a mediterranean climate. The summers are warm and dry, and the temperature is cold in the winter. The average annual temperature for SeaTac is 15° degrees and there is about 288 mm of rain in a year. It is dry for 202 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 25°C
- Night:the average nighttime temperature is between 1°C and 11°C
- Sea temperature: the sea temperature is between -1°C and 20°C
- Rain: it rains 130 days and there is a total of approximately 286 mm rainfall
- Snow: it snows an average of 9 days per year
- Sun hours: throughout the year there are 2694 sun hours
Maximum temperature: | between 6°C and 25°C |
Warmest month: | 25°C in July |
Coldest month: | 6°C in December |
Night temperature: | between 1°C and 11°C |
Sea temperature: | between -1°C and 20°C |
Dry days: | 226 days |
Days with rain: | 130 days |
Days with snow: | 9 days |
Total rain sum: | 286 mm |
Hours of sunshine: | 2694 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for SeaTac.
Precipitation graph
This graph shows the average amount of rainfall per month for SeaTac.
Climate table of SeaTac
In this climate table you can see at a glance what the average weather per month is for SeaTac. 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 SeaTac might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°C) | 7 | 8 | 11 | 13 | 18 | 21 | 25 | 25 | 22 | 15 | 9 | 6 |
Night temp. (°C) | 2 | 1 | 3 | 4 | 6 | 8 | 11 | 11 | 10 | 7 | 4 | 1 |
Water temp. (°C) | 5 | 0 | -1 | 6 | 14 | 20 | 19 | 19 | 15 | 13 | 10 | 9 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (mm) | 28 | 29 | 29 | 24 | 16 | 14 | 6 | 11 | 15 | 34 | 42 | 38 |
Days with rain | 11 | 11 | 14 | 14 | 11 | 10 | 5 | 5 | 10 | 12 | 15 | 12 |
Days with snow | 1 | 3 | 2 | - | - | - | - | - | - | - | 1 | 2 |
Dry days | 19 | 14 | 15 | 16 | 20 | 20 | 26 | 26 | 20 | 19 | 14 | 17 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 4 | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 5 | 4 | 4 |
Wind force (Bft) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
UV-index | 2 | 2 | 3 | 3 | 4 | 5 | 5 | 4 | 4 | 3 | 2 | 2 |
Best time to visit SeaTac
The best time to visit SeaTac 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 SeaTac is 25°C in July and the lowest is 6°C in December. The highest water temperature is 20°C and it does not get colder than -1°C.
Climate of SeaTac by month
What is the average climate in a given month for SeaTac? 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.
SeaTac weather experiences
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