Mount Vernon, OR Weather & Growing Conditions
Overnight
50°F
Mostly Clear
Mostly clear, with a low around 50. East wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Clear | 2 mph E | 0% |
| Saturday | 77°F | Sunny | 1 to 5 mph SW | 0% |
| Saturday Night | 52°F | Partly Cloudy | 1 to 7 mph NE | 0% |
| Sunday | 82°F | Sunny | 2 to 6 mph E | 0% |
| Sunday Night | 53°F | Mostly Clear | 1 to 12 mph NE | 0% |
| Monday | 83°F | Sunny | 2 to 8 mph NE | 0% |
| Monday Night | 55°F | Partly Cloudy | 2 to 6 mph NE | 0% |
| Tuesday | 82°F | Sunny | 2 to 7 mph W | 0% |
| Tuesday Night | 53°F | Mostly Clear | 2 to 7 mph NE | 0% |
| Wednesday | 80°F | Sunny | 2 to 6 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 6 mph N | 1% |
| Thursday | 80°F | Mostly Sunny | 3 to 7 mph S | 1% |
| Thursday Night | 51°F | Partly Cloudy | 3 to 7 mph N | 4% |
| Friday | 74°F | Mostly Sunny | 3 to 8 mph NW | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Vernon, OR
Last spring frost
May 28
First fall frost
Sep 18
Growing season
113 days
Hardiness zone
6b
Explore more for Mount Vernon, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, John Day, Or (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.