Vernonia, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Vernonia, a city in Columbia County, Oregon.
Tonight
46°F
Patchy Fog
Patchy fog. Mostly cloudy. Low around 46, with temperatures rising to around 48 overnight. North northwest wind around 1 mph.
7-day forecast for Vernonia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 46°F | Patchy Fog | 1 mph NNW | 0% |
| Saturday | 77°F | Areas Of Fog then Partly Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 46°F | Patchy Fog | 3 mph NNW | 0% |
| Sunday | 78°F | Patchy Fog then Mostly Sunny | 3 mph NNW | 0% |
| Sunday Night | 47°F | Partly Cloudy then Areas Of Fog | 0 to 3 mph NNW | 0% |
| Monday | 72°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph NW | 0% |
| Monday Night | 47°F | Areas Of Fog | 0 to 5 mph NW | 0% |
| Tuesday | 69°F | Patchy Fog then Partly Sunny | 0 to 5 mph NW | 0% |
| Tuesday Night | 44°F | Partly Cloudy then Areas Of Fog | 0 to 5 mph NW | 0% |
| Wednesday | 70°F | Areas Of Fog then Partly Sunny | 2 mph N | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 2 mph N | 4% |
| Thursday | 73°F | Partly Sunny | 1 mph NNW | 8% |
| Thursday Night | 47°F | Slight Chance Light Rain | 1 mph NNW | 22% |
| Friday | 66°F | Slight Chance Light Rain then Partly Sunny | 0 to 3 mph NW | 16% |
Forecast source: National Weather Service (api.weather.gov) for Vernonia (45.864, -123.184). Updated through the day.
Growing snapshot for Vernonia
Last spring frost
May 8
First fall frost
Oct 1
Growing season
144 days
Hardiness zone
8a
More local growing data for Vernonia: nearby ZIP 97064 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Vernonia #2, Or (2.2 mi from Vernonia). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.