The warmest month in Seattle is August, with an average high of 24.8°C and an average low of 15.1°C. The coldest month is February, with an average high of 7.9°C and an average low of 2.3°C. Between 2016 and 2025, the highest temperature recorded was 37.9°C (June 28, 2021) and the lowest was -10.1°C (January 13, 2024).
| Month | Avg. high | Avg. low | Precipitation |
|---|---|---|---|
| January | 7.9°C | 2.6°C | 176 mm |
| February | 7.9°C | 2.3°C | 125 mm |
| March | 10.9°C | 3.7°C | 108 mm |
| April | 13.8°C | 6.1°C | 84 mm |
| May | 17.9°C | 9.4°C | 55 mm |
| June | 20.9°C | 12.1°C | 51 mm |
| July | 24.6°C | 14.5°C | 14 mm |
| August | 24.8°C | 15.1°C | 26 mm |
| September | 20.7°C | 13°C | 63 mm |
| October | 14.9°C | 8.8°C | 124 mm |
| November | 10.5°C | 5.7°C | 169 mm |
| December | 7.7°C | 3.3°C | 184 mm |
Based on daily historical weather data 2016–2025. Weather data by Open-Meteo.com.
Explore detailed temperature patterns in Seattle, United States through interactive candlestick charts. View historical weather data with daily temperature ranges, trends, and variations. Whether you're planning a trip to Seattle or analyzing local climate patterns, our unique visualization makes temperature data easy to understand. Get insights into Seattle's weather patterns from hourly updates to yearly historical data.