Seattle Weather by Month
Twelve months of Seattle, United States weather — averages from 2006–2025.
Seattle's warmest month is July (average high 24.4°C (75.9°F)) and the coolest is December (6.9°C (44.4°F)). The most rain falls in November (about 191 mm), and July is the driest (about 17 mm). July is the sunniest, with about 12.8 hours of sunshine a day.
Best months to visit Seattle
Ranked within Seattle's own year by temperature comfort, rainy days and sunshine — historical averages, not a forecast.
Seattle month by month
January
PoorHigh 7.5°C (45.5°F)
Low 2.1°C (35.8°F)
- Rainfall
- 177 mm (6.9 in)
- Rainy days
- 18 rainy days
- Sunshine
- 4.3 h sunshine / day
February
FairHigh 8.1°C (46.6°F)
Low 1.9°C (35.4°F)
- Rainfall
- 116 mm (4.6 in)
- Rainy days
- 15 rainy days
- Sunshine
- 5.5 h sunshine / day
March
PoorHigh 10.6°C (51.1°F)
Low 3.3°C (37.9°F)
- Rainfall
- 135 mm (5.3 in)
- Rainy days
- 17 rainy days
- Sunshine
- 7.4 h sunshine / day
April
GoodHigh 13.3°C (55.9°F)
Low 5.2°C (41.4°F)
- Rainfall
- 96 mm (3.8 in)
- Rainy days
- 14 rainy days
- Sunshine
- 9.4 h sunshine / day
May
GoodHigh 17.3°C (63.1°F)
Low 8.7°C (47.7°F)
- Rainfall
- 67 mm (2.7 in)
- Rainy days
- 11 rainy days
- Sunshine
- 10.4 h sunshine / day
June
GreatHigh 20.2°C (68.4°F)
Low 11.6°C (52.9°F)
- Rainfall
- 52 mm (2 in)
- Rainy days
- 8 rainy days
- Sunshine
- 11.4 h sunshine / day
July
GreatHigh 24.4°C (75.9°F)
Low 14.2°C (57.6°F)
- Rainfall
- 17 mm (0.7 in)
- Rainy days
- 4 rainy days
- Sunshine
- 12.8 h sunshine / day
August
GreatHigh 24.3°C (75.7°F)
Low 14.5°C (58.1°F)
- Rainfall
- 29 mm (1.1 in)
- Rainy days
- 5 rainy days
- Sunshine
- 11.5 h sunshine / day
September
GreatHigh 20.6°C (69.1°F)
Low 12.2°C (54°F)
- Rainfall
- 66 mm (2.6 in)
- Rainy days
- 9 rainy days
- Sunshine
- 9.6 h sunshine / day
October
GoodHigh 14.7°C (58.5°F)
Low 8.3°C (46.9°F)
- Rainfall
- 126 mm (5 in)
- Rainy days
- 14 rainy days
- Sunshine
- 6.7 h sunshine / day
November
PoorHigh 9.9°C (49.8°F)
Low 4.8°C (40.6°F)
- Rainfall
- 191 mm (7.5 in)
- Rainy days
- 18 rainy days
- Sunshine
- 4.7 h sunshine / day
December
PoorHigh 6.9°C (44.4°F)
Low 2.3°C (36.1°F)
- Rainfall
- 179 mm (7 in)
- Rainy days
- 18 rainy days
- Sunshine
- 3.9 h sunshine / day
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Based on 20 years of historical weather data (2006–2025) from Open-Meteo. Monthly averages, not a forecast.