Washington climate
World Climates covers 4 places in Washington. By annual mean temperature, the warmest is Tri-Cities (14 °C57 °F) and the coolest is Spokane (9 °C49 °F). The wettest is Everett with 1,253 mm49 in of precipitation per year, the driest Tri-Cities with 278 mm11 in.
The most common climate types (Köppen classification computed from these averages) are warm-summer Mediterranean (Csb, 2 places), cold semi-arid (BSk, 1 place) and hot-summer continental (dry summer) (Dsa, 1 place).
The highest monthly average high is in Tri-Cities (35 °C94 °F in July); the lowest monthly average low is in Spokane (−5 °C23 °F in December).
Across the places in Washington, the months that most often rank as the most comfortable are June, August and September (4, 3 and 4 of 4 places respectively).
Frequently asked questions
Which is the warmest place in Washington?
By annual mean temperature, the warmest place in Washington is Tri-Cities at 14 °C57 °F. The coolest is Spokane at 9 °C49 °F.
Where does it rain the most in Washington?
Everett gets the most precipitation, 1,253 mm49 in in an average year. The driest place is Tri-Cities with 278 mm11 in.
How many places in Washington does this site cover?
World Climates has climate data for 4 places in Washington. Each one has a page with monthly averages for temperature, rainfall, humidity and daylight.
When is the best time to visit Washington?
It depends on the place. Across Washington, the months that most often rank as the most comfortable are June, August and September. Check the page of each city for its own best months.
Climate of every place in Washington
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Seattle | 11 | 24 | 2 | 1,232 |
| Tri-Cities | 14 | 35 | −1 | 278 |
| Spokane | 9 | 30 | −5 | 552 |
| Everett | 11 | 24 | 2 | 1,253 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Other cities over 100,000 people
These cities share a NASA POWER grid cell with a larger place, so their averages are shown on that page:
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.