Climate of Washington, USA
Area-weighted average across Washington. For where people actually live and travel, see the cities below.
Washington, a subdivision of United States of America, has a seasonal climate on average. Area-weighted monthly temperatures across the whole territory range from -1.2°C / 29.8°F in January to 17.8°C / 64°F in August, with rainfall from 27 mm / 1.1 in to 159 mm / 6.3 in depending on the season (1037 mm / 40.8 in total across the year). See the 4 cities listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | -1.2°C29.8°F | 149 mm5.9″ | Snowy |
| February | 1.1°C34°F | 113 mm4.4″ | Snowy |
| March | 3.9°C39°F | 100 mm3.9″ | — |
| April | 7°C44.6°F | 72 mm2.8″ | — |
| May | 10.9°C51.6°F | 59 mm2.3″ | — |
| June | 14.4°C57.9°F | 47 mm1.9″ | Sunny & Mild |
| July | 17.5°C63.5°F | 27 mm1.1″ | Sunny & Mild |
| August | 17.8°C64°F | 31 mm1.2″ | Sunny & Mild |
| September | 13.9°C57°F | 46 mm1.8″ | — |
| October | 8.4°C47.1°F | 84 mm3.3″ | — |
| November | 2.7°C36.9°F | 150 mm5.9″ | — |
| December | -1.1°C30°F | 159 mm6.3″ | Snowy |
Frequently asked questions
What is the best time to visit Washington?
The best months to visit Washington, United States of America for sunny, dry weather are June, July, August. The warmest month is August at an area-wide average of 17.8°C / 64°F, and the driest is July with about 27 mm / 1.1 in of rainfall.
What is the climate of Washington?
Washington, United States of America has area-weighted monthly average temperatures ranging from -1.2°C / 29.8°F in January to 17.8°C / 64°F in August. Annual rainfall averages about 1037 mm / 40.8 in, with the wettest month being December (159 mm / 6.3 in) and the driest July (27 mm / 1.1 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Washington?
The hottest month in Washington is August, with an area-wide average temperature of 17.8°C / 64°F.
What is the coldest month in Washington?
The coldest month in Washington is January, with an area-wide average temperature of -1.2°C / 29.8°F.
When does it rain most in Washington?
The wettest month in Washington is December, averaging about 159 mm / 6.3 in of rainfall. The driest is July with about 27 mm / 1.1 in.