Seattle, WA Weather
Seattle hourly forecast: next 24 hours
Today's high of 83°F (28°C) is about 6°F (3°C) above the typical August high of 77°F (25°C).
Current conditions in detail
Seattle weather tomorrow (Monday, August 17)
Tomorrow in Seattle looks sunny, with a high of 85° and an overnight low of 55°. Rain is unlikely (4% chance). Winds top out near 8 mph, and the UV index reaches 6 (moderate).
Seattle 14-day forecast
About the weather in Seattle
Seattle has a oceanic climate, marked by mild temperatures year-round with regular rainfall. Average daytime highs range from about 45°F (7°C) in December to around 77°F (25°C) in August, and the city records roughly 151 days of measurable precipitation a year.
Seattle weather: quick facts
- Hottest month: August - highs near 77°F (25°C)
- Coldest month: December - highs near 45°F (7°C)
- Record high: 100°F (38°C) · Record low: 14°F (-10°C) (2015–2024)
- Wettest month: December (19 rainy days) · Sunniest: July (12.7 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
- Snow: about 7 days a year
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 77°F (25°C) and overnight lows stay near 59°F (15°C). The coolest month is December, with typical highs of 45°F (7°C) and lows around 37°F (3°C). Based on 2015–2024 weather data, temperatures have reached as high as 100°F (38°C) and dropped as low as 14°F (-10°C).
Rain, sun and snow
December is usually the wettest month. It brings about 7.4 inches (189 mm) of rain over 19 days, while July is the driest. July brings the most sunshine, averaging 12.7 hours of sun a day. Snow falls on about 7 days in a typical year, mostly from December through March.
Season by season
Spring (March through May)
Spring in Seattle is crisp but comfortable, with daytime highs averaging 58°F (14°C) and nights around 43°F (6°C); expect showers on roughly 39 days across the season.
Summer (June through August)
Summer in Seattle brings comfortable warmth, with daytime highs averaging 74°F (23°C) and nights around 57°F (14°C); rain falls on about 17 days over the three months.
Fall (September through November)
Fall in Seattle is crisp but comfortable, with daytime highs averaging 59°F (15°C) and nights around 48°F (9°C); expect showers on roughly 42 days across the season.
Winter (December through February)
Winter in Seattle runs cold, with daytime highs averaging 46°F (8°C) and nights around 37°F (3°C); expect showers on roughly 53 days across the season, plus around 6 snowy days.
Average temperatures in Seattle by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 47° | 37° | 18 | 7.3 in | 4.1 h/day | 84% |
| February | 47° | 36° | 15 | 4.9 in | 5.1 h/day | 82% |
| March | 52° | 39° | 15 | 4.3 in | 7.5 h/day | 80% |
| April | 57° | 42° | 14 | 3.3 in | 9.2 h/day | 77% |
| May | 64° | 49° | 10 | 2.1 in | 10.1 h/day | 74% |
| June | 70° | 54° | 8 | 2.0 in | 11.7 h/day | 70% |
| July | 76° | 58° | 3 | 0.6 in | 12.7 h/day | 66% |
| August | 77° | 59° | 5 | 1.1 in | 11.5 h/day | 68% |
| September | 69° | 55° | 10 | 2.5 in | 9.2 h/day | 76% |
| October | 59° | 48° | 14 | 5.0 in | 6.5 h/day | 82% |
| November | 50° | 41° | 18 | 6.9 in | 4.7 h/day | 83% |
| December | 45° | 37° | 19 | 7.4 in | 3.6 h/day | 84% |