Mount Vernon, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Vernon, a city in Skagit County, Washington.
Overnight
51°F
Mostly Cloudy
Mostly cloudy, with a low around 51. Wind around 0 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 71°F | Partly Sunny | 0 to 3 mph WSW | 0% |
| Saturday Night | 51°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 71°F | Partly Sunny | 0 to 3 mph W | 0% |
| Sunday Night | 51°F | Partly Cloudy | 0 to 3 mph SSE | 0% |
| Monday | 70°F | Mostly Sunny | 3 mph SW | 0% |
| Monday Night | 52°F | Partly Cloudy | 0 to 3 mph SSW | 0% |
| Tuesday | 67°F | Partly Sunny | 0 to 3 mph WSW | 0% |
| Tuesday Night | 50°F | Mostly Cloudy | 0 to 3 mph SE | 12% |
| Wednesday | 67°F | Partly Sunny then Slight Chance Light Rain | 2 mph SW | 19% |
| Wednesday Night | 50°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph SW | 19% |
| Thursday | 65°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 5 mph NNW | 15% |
| Thursday Night | 49°F | Slight Chance Light Rain | 0 to 5 mph WNW | 23% |
| Friday | 64°F | Slight Chance Light Rain then Partly Sunny | 0 to 5 mph WNW | 23% |
Forecast source: National Weather Service (api.weather.gov) for Mount Vernon (48.417, -122.312). Updated through the day.
Growing snapshot for Mount Vernon
Last spring frost
Mar 24
First fall frost
Nov 3
Growing season
224 days
Hardiness zone
8b
More local growing data for Mount Vernon: nearby ZIP 98273 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Mt Vernon 3 Wnw, Wa (2.6 mi from Mount Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.