Mount Vernon, WA
Climate overview — based on NOAA 1991-2020 normals from MT VERNON 3 WNW, WA US.
Year-round temperatures (°F)
Avg high
Avg low
Climate summary
Mount Vernon has an annual average temperature of 51.4°F with about 0 inches of precipitation per year. The warmest month is August (average high 75.1°F), and the coldest is February (average low 34.9°F).
Pleasant months
3 / 12
avg high 65–80°F, low ≥ 50°F
Annual swing
23.5°F
warmest to coldest month
Best time to visit Mount Vernon
Full guide →Climate change signal
All-time records →0 of 366 (0%) of Mount Vernon's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1950s | 49 | |
| 1960s | 83 | |
| 1970s | 57 | |
| 1980s | 76 | |
| 1990s | 73 | |
| 2000s | 28 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 47.1°F | 35.0°F | 41.1°F | in | — | — |
| February | 49.6°F | 34.9°F | 42.2°F | in | — | — |
| March | 53.7°F | 38.0°F | 45.8°F | in | — | — |
| April | 58.4°F | 41.3°F | 49.8°F | in | — | — |
| May | 64.8°F | 46.6°F | 55.7°F | in | — | — |
| June | 68.7°F | 50.7°F | 59.7°F | in | — | — |
| July | 73.3°F | 53.5°F | 63.4°F | in | — | — |
| August | 75.1°F | 53.2°F | 64.1°F | in | — | — |
| September | 68.8°F | 48.6°F | 58.7°F | in | — | — |
| October | 59.3°F | 43.2°F | 51.3°F | in | — | — |
| November | 51.2°F | 38.8°F | 45.0°F | in | — | — |
| December | 45.9°F | 35.3°F | 40.6°F | in | — | — |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when