World > North America > United States > Washington City of Seattle, WA
Seattle, Washington Climate Averages
Seattle Monthly Averages
12 Month Weather Scroll °F 
°C
°C
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 46°F Lo 35°F | Hi 47°F Lo 34°F | Hi 52°F Lo 36°F | Hi 58°F Lo 40°F | Hi 67°F Lo 44°F | Hi 72°F Lo 48°F | Hi 80°F Lo 53°F | Hi 80°F Lo 54°F | Hi 73°F Lo 51°F | Hi 61°F Lo 45°F | Hi 50°F Lo 39°F | Hi 44°F Lo 34°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 |
| 4.3 in | 3 in | 3.3 in | 2.3 in | 1.6 in | 1.2 in | 0.5 in | 0.7 in | 1.5 in | 3.2 in | 3.9 in | 3.6 in |
| 84% | 84% | 81% | 77% | 73% | 71% | 67% | 69% | 72% | 78% | 83% | 84% |
| 57% | 57% | 54% | 50% | 43% | 40% | 26% | 24% | 33% | 42% | 54% | 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 |
| 10 | 8 | 9 | 10 | 13 | 14 | 22 | 22 | 15 | 13 | 8 | 11 |
| 19 | 17 | 20 | 18 | 15 | 13 | 7 | 6 | 13 | 16 | 20 | 18 |
| 2 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 7 | 5 | 4 | 6 | 6 | 7 | 4 | 4 | 5 | 4 | 5 | 5 |
| 2 | 2 | 3 | 3 | 5 | 5 | 6 | 4 | 4 | 3 | 2 | 2 |
| 221 | 208 | 254 | 261 | 300 | 301 | 337 | 338 | 315 | 290 | 240 | 234 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 8°C Lo 2°C | Hi 8°C Lo 1°C | Hi 11°C Lo 2°C | Hi 14°C Lo 4°C | Hi 19°C Lo 7°C | Hi 22°C Lo 9°C | Hi 27°C Lo 12°C | Hi 26°C Lo 12°C | Hi 23°C Lo 11°C | Hi 16°C Lo 7°C | Hi 10°C Lo 4°C | Hi 7°C Lo 1°C |
| 8 km/h | 8 km/h | 8 km/h | 8 km/h | 7 km/h | 7 km/h | 6 km/h | 6 km/h | 6 km/h | 7 km/h | 8 km/h | 7 km/h |
| 109 mm | 76 mm | 84 mm | 57 mm | 40 mm | 29 mm | 11 mm | 18 mm | 37 mm | 81 mm | 100 mm | 91 mm |
| 84% | 84% | 81% | 77% | 73% | 71% | 67% | 69% | 72% | 78% | 83% | 84% |
| 57% | 57% | 54% | 50% | 43% | 40% | 26% | 24% | 33% | 42% | 54% | 56% |
| 1019 mb | 1018 mb | 1017 mb | 1017 mb | 1017 mb | 1016 mb | 1017 mb | 1016 mb | 1016 mb | 1017 mb | 1017 mb | 1019 mb |
| 10 | 8 | 9 | 10 | 13 | 14 | 22 | 22 | 15 | 13 | 8 | 11 |
| 19 | 17 | 20 | 18 | 15 | 13 | 7 | 6 | 13 | 16 | 20 | 18 |
| 2 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 7 | 5 | 4 | 6 | 6 | 7 | 4 | 4 | 5 | 4 | 5 | 5 |
| 2 | 2 | 3 | 3 | 5 | 5 | 6 | 4 | 4 | 3 | 2 | 2 |
| 221 | 208 | 254 | 261 | 300 | 301 | 337 | 338 | 315 | 290 | 240 | 234 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Barometric Pressure |
| Average Dry Days |
| Avg. Precip. Days |
| Average Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.
