Cornelius, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cornelius, a city in Washington County, Oregon.
This Afternoon
73°F
Sunny
Sunny, with a high near 73. Northeast wind around 1 mph.
7-day forecast for Cornelius
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Sunny | 1 mph NE | 0% |
| Tonight | 50°F | Mostly Clear then Patchy Fog | 2 mph N | 0% |
| Saturday | 80°F | Areas Of Fog then Mostly Sunny | 2 mph N | 0% |
| Saturday Night | 51°F | Partly Cloudy | 3 mph NNW | 0% |
| Sunday | 84°F | Patchy Fog then Sunny | 1 to 6 mph NNW | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Monday | 77°F | Mostly Sunny | 0 to 7 mph NNW | 0% |
| Monday Night | 51°F | Partly Cloudy | 1 to 7 mph NNW | 0% |
| Tuesday | 74°F | Mostly Sunny | 0 to 6 mph NNW | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 6 mph NNW | 0% |
| Wednesday | 73°F | Mostly Sunny | 2 mph N | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 2 mph NNW | 2% |
| Thursday | 76°F | Mostly Sunny | 2 mph NNW | 6% |
| Thursday Night | 52°F | Slight Chance Light Rain | 2 mph NNW | 21% |
Forecast source: National Weather Service (api.weather.gov) for Cornelius (45.519, -123.051). Updated through the day.
Growing snapshot for Cornelius
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
192 days
Hardiness zone
8b
More local growing data for Cornelius: nearby ZIP 97113 weather · frost dates · planting calendar · Oregon frost dates
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Climate data from the nearest NOAA station, Forest Grove, Or (3.1 mi from Cornelius). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.