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
53°F
Clear
Clear, with a low around 53. Wind around 0 mph.
7-day forecast for Mount Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Clear | 0 mph | 0% |
| Tuesday | 82°F | Sunny | 0 to 7 mph NW | 0% |
| Tuesday Night | 57°F | Patchy Smoke then Mostly Clear | 1 to 6 mph WSW | 0% |
| Wednesday | 86°F | Sunny then Patchy Smoke | 1 to 6 mph WNW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 6 mph ENE | 0% |
| Thursday | 87°F | Sunny | 0 to 6 mph SW | 0% |
| Thursday Night | 60°F | Mostly Clear | 1 to 5 mph S | 0% |
| Friday | 82°F | Sunny | 2 to 6 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 2 to 6 mph SSW | 0% |
| Saturday | 78°F | Sunny | 2 to 8 mph SW | 0% |
| Saturday Night | 55°F | Mostly Clear | 1 to 7 mph SSW | 0% |
| Sunday | 76°F | Mostly Sunny | 2 to 7 mph SW | 0% |
| Sunday Night | 55°F | Mostly Clear | 1 to 7 mph SW | 4% |
| Monday | 76°F | Mostly Sunny | 1 to 6 mph WSW | 4% |
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 Aug 4, 2026.