Climate of Seattle, Washington, USA
Point-value climate at Seattle (Washington, United States of America). Population approximately 3,074,000.
Located in Washington, United States of America, Seattle has a seasonal climate. Population approximately 3,074,000. Monthly average temperatures range from 4.8°C / 40.6°F in January to 18.4°C / 65.1°F in August, with rainfall varying from 25 mm / 1 in (July) to 161 mm / 6.3 in (December) — about 1012 mm / 39.8 in across the year. These are point-value climate normals sampled at Seattle's coordinates — often quite different from the surrounding region's area-weighted average.
Best sunny months: June, July, August, September.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 4.8°C40.6°F | 137 mm5.4″ | — |
| February | 6.1°C43°F | 107 mm4.2″ | — |
| March | 7.5°C45.5°F | 106 mm4.2″ | — |
| April | 9.7°C49.5°F | 76 mm3″ | — |
| May | 12.9°C55.2°F | 49 mm1.9″ | — |
| June | 15.7°C60.3°F | 42 mm1.7″ | Sunny & Mild |
| July | 18.1°C64.6°F | 25 mm1″ | Sunny & Mild |
| August | 18.4°C65.1°F | 31 mm1.2″ | Sunny & Mild |
| September | 15.7°C60.3°F | 45 mm1.8″ | Sunny & Mild |
| October | 11.1°C52°F | 85 mm3.3″ | — |
| November | 7.1°C44.8°F | 148 mm5.8″ | — |
| December | 4.8°C40.6°F | 161 mm6.3″ | — |
Frequently asked questions
What is the best time to visit Seattle?
The months with the sunniest, driest weather are June, July, August, September. Seattle's warmest month is August at an average of 18.4°C / 65.1°F, and its driest month is July with about 25 mm / 1 in of rain.
What is the climate of Seattle?
Seattle, in Washington, United States of America, has monthly average temperatures ranging from 4.8°C / 40.6°F in January to 18.4°C / 65.1°F in August. Annual rainfall is approximately 1012 mm / 39.8 in, with the wettest month being December (161 mm / 6.3 in) and the driest July (25 mm / 1 in).
What is the average temperature in Seattle in August?
The average temperature in Seattle in August is 18.4°C / 65.1°F, with rainfall of about 31 mm / 1.2 in — the warmest month of the year.
When is the driest month in Seattle?
The driest month in Seattle is July, with about 25 mm / 1 in of average monthly rainfall. Average temperature that month is 18.1°C / 64.6°F.
When is the wettest month in Seattle?
The wettest month in Seattle is December, with approximately 161 mm / 6.3 in of average monthly rainfall.