WeatherWX.comSeattle Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 46°F Lo 36°F | Hi 47°F Lo 35°F | Hi 52°F Lo 38°F | Hi 58°F Lo 41°F | Hi 66°F Lo 46°F | Hi 72°F Lo 50°F | Hi 80°F Lo 55°F | Hi 80°F Lo 56°F | Hi 73°F Lo 53°F | Hi 61°F Lo 46°F | Hi 51°F Lo 40°F | Hi 44°F Lo 35°F |
| 5 mph | 5 mph | 5 mph | 5 mph | 4 mph | 4 mph | 4 mph | 4 mph | 4 mph | 4 mph | 5 mph | 5 mph |
| 3.5 in | 2.4 in | 2.6 in | 1.9 in | 1.4 in | 1 in | 0.4 in | 0.6 in | 1.3 in | 2.7 in | 3.4 in | 2.9 in |
| 84% | 83% | 81% | 77% | 74% | 72% | 68% | 69% | 73% | 78% | 83% | 84% |
| 56% | 54% | 53% | 49% | 42% | 39% | 24% | 23% | 31% | 41% | 52% | 56% |
| 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in |
| 17 | 17 | 21 | 25 | 27 | 28 | 30 | 30 | 27 | 24 | 20 | 20 |
| 12 | 8 | 8 | 5 | 4 | 2 | 1 | 1 | 3 | 7 | 10 | 9 |
| 2 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 4 | 3 | 3 | 3 | 4 | 5 | 2 | 2 | 3 | 2 | 2 | 4 |
| 2 | 2 | 3 | 4 | 5 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 230 | 222 | 256 | 270 | 302 | 305 | 341 | 340 | 320 | 294 | 248 | 235 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 8°C Lo 2°C | Hi 9°C Lo 2°C | Hi 11°C Lo 3°C | Hi 14°C Lo 5°C | Hi 19°C Lo 8°C | Hi 22°C Lo 10°C | Hi 27°C Lo 13°C | Hi 27°C Lo 13°C | Hi 23°C Lo 12°C | Hi 16°C Lo 8°C | Hi 10°C Lo 5°C | Hi 7°C Lo 2°C |
| 8 km/h | 8 km/h | 8 km/h | 8 km/h | 7 km/h | 6 km/h | 6 km/h | 6 km/h | 6 km/h | 7 km/h | 8 km/h | 8 km/h |
| 88 mm | 61 mm | 67 mm | 49 mm | 36 mm | 25 mm | 10 mm | 14 mm | 34 mm | 67 mm | 86 mm | 72 mm |
| 84% | 83% | 81% | 77% | 74% | 72% | 68% | 69% | 73% | 78% | 83% | 84% |
| 56% | 54% | 53% | 49% | 42% | 39% | 24% | 23% | 31% | 41% | 52% | 56% |
| 1019 mb | 1019 mb | 1017 mb | 1017 mb | 1017 mb | 1016 mb | 1017 mb | 1016 mb | 1016 mb | 1017 mb | 1017 mb | 1018 mb |
| 17 | 17 | 21 | 25 | 27 | 28 | 30 | 30 | 27 | 24 | 20 | 20 |
| 12 | 8 | 8 | 5 | 4 | 2 | 1 | 1 | 3 | 7 | 10 | 9 |
| 2 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 4 | 3 | 3 | 3 | 4 | 5 | 2 | 2 | 3 | 2 | 2 | 4 |
| 2 | 2 | 3 | 4 | 5 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 230 | 222 | 256 | 270 | 302 | 305 | 341 | 340 | 320 | 294 | 248 | 235 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.
