Mount Vernon, WA Weather & Growing Conditions
Overnight
51°F
Mostly Cloudy
Mostly cloudy, with a low around 51. South southeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 1 mph SSE | 0% |
| Saturday | 71°F | Partly Sunny | 0 to 5 mph SW | 0% |
| Saturday Night | 50°F | Partly Cloudy | 2 mph W | 0% |
| Sunday | 71°F | Partly Sunny | 0 to 5 mph W | 0% |
| Sunday Night | 50°F | Partly Cloudy | 1 to 5 mph S | 0% |
| Monday | 70°F | Partly Sunny | 1 to 5 mph SSW | 0% |
| Monday Night | 51°F | Partly Cloudy | 0 to 5 mph SSW | 0% |
| Tuesday | 68°F | Partly Sunny | 0 to 5 mph SSW | 0% |
| Tuesday Night | 50°F | Mostly Cloudy | 1 to 5 mph S | 12% |
| Wednesday | 67°F | Partly Sunny then Slight Chance Light Rain | 3 mph SW | 18% |
| Wednesday Night | 50°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 3 mph SSW | 18% |
| Thursday | 65°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 6 mph N | 15% |
| Thursday Night | 49°F | Slight Chance Light Rain | 0 to 6 mph WNW | 23% |
| Friday | 65°F | Slight Chance Light Rain then Partly Sunny | 0 to 6 mph WNW | 23% |
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 Sep 19, 2026.