Climate for Seattle Sea-Tac Airport, Washington
Home : Climate Graphs: Washington : Seattle Sea-Tac Airport
Average Temperatures for Seattle Sea-Tac Airport
| Month | Low | High |
|---|---|---|
| Jan | 35.9°F | 45.8°F |
| Feb | 37.2°F | 49.5°F |
| Mar | 39.1°F | 53.2°F |
| Apr | 42.1°F | 58.2°F |
| May | 47.2°F | 64.4°F |
| Jun | 51.7°F | 69.6°F |
| Jul | 55.3°F | 75.3°F |
| Aug | 55.7°F | 75.6°F |
| Sept | 51.9°F | 70.2°F |
| Oct | 45.7°F | 59.7°F |
| Nov | 39.9°F | 50.5°F |
| Dec | 35.9°F | 45.5°F |
Seattle Sea-Tac Airport's coldest month is January when the average temperature overnight is 35.9°F. In August, the warmest month, the average day time temperature rises to 75.6°F.
Average Rainfall for Seattle Sea-Tac Airport
| Month | Precipitation |
|---|---|
| Jan | 5.13in. |
| Feb | 4.18in. |
| Mar | 3.75in. |
| Apr | 2.59in. |
| May | 1.77in. |
| Jun | 1.49in. |
| Jul | 0.79in. |
| Aug | 1.02in. |
| Sept | 1.63in. |
| Oct | 3.19in. |
| Nov | 5.90in. |
| Dec | 5.62in. |
The driest month in Seattle Sea-Tac Airport is July with 0.79 inches of precipitation, and with 5.90 inches November is the wettest month.