Vernonia, OR Weather & Growing Conditions
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 76 in the afternoon. North wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 2 mph N | 0% |
| Tonight | 49°F | Mostly Clear | 5 mph NNW | 0% |
| Sunday | 79°F | Mostly Sunny | 5 mph NNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 6 mph NNW | 0% |
| Monday | 75°F | Mostly Sunny | 6 mph NW | 0% |
| Monday Night | 50°F | Partly Cloudy | 6 mph NW | 0% |
| Tuesday | 71°F | Partly Sunny | 5 mph NW | 0% |
| Tuesday Night | 47°F | Partly Cloudy then Patchy Fog | 1 to 5 mph NW | 2% |
| Wednesday | 69°F | Patchy Fog then Partly Sunny | 2 mph W | 2% |
| Wednesday Night | 47°F | Mostly Cloudy | 3 mph NW | 3% |
| Thursday | 66°F | Partly Sunny | 5 mph NNW | 9% |
| Thursday Night | 47°F | Mostly Cloudy | 6 mph NNW | 14% |
| Friday | 64°F | Slight Chance Light Rain | 6 mph NNW | 17% |
| Friday Night | 45°F | Partly Cloudy | 6 mph NW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Vernonia, OR
Last spring frost
May 8
First fall frost
Oct 1
Growing season
144 days
Hardiness zone
8b
Explore more for Vernonia, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Vernonia #2, Or (8.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.