Mount Vernon, WA Weather & Growing Conditions
Tonight
37°F
Partly Cloudy
Partly cloudy, with a low around 37. East southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Partly Cloudy | 2 mph ESE | 4% |
| Wednesday | 58°F | Partly Sunny then Slight Chance Light Rain | 2 to 10 mph SE | 16% |
| Wednesday Night | 47°F | Light Rain | 6 to 15 mph SSE | 96% |
| Thursday | 56°F | Chance Light Rain then Partly Sunny | 6 to 10 mph SE | 36% |
| Thursday Night | 47°F | Light Rain | 8 to 17 mph SE | 87% |
| Friday | 55°F | Light Rain | 9 to 18 mph SE | 87% |
| Friday Night | 46°F | Chance Light Rain | 3 to 10 mph ESE | 40% |
| Saturday | 61°F | Chance Light Rain | 3 to 14 mph SE | 36% |
| Saturday Night | 49°F | Light Rain | 14 to 22 mph SSE | 80% |
| Sunday | 56°F | Light Rain | 3 to 15 mph S | 80% |
| Sunday Night | 42°F | Chance Light Rain | 3 to 7 mph SE | 31% |
| Monday | 55°F | Chance Light Rain | 3 to 12 mph ESE | 54% |
| Monday Night | 47°F | Light Rain Likely | 12 to 20 mph SE | 72% |
| Tuesday | 58°F | Light Rain Likely | 15 to 20 mph SE | 72% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Vernon, WA
Last spring frost
Mar 24
First fall frost
Nov 3
Growing season
224 days
Hardiness zone
8b
Explore more for Mount Vernon, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Mt Vernon 3 Wnw, Wa (2.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.