Cornelius, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cornelius, a city in Washington County, Oregon.
Today
61°F
Mostly Cloudy
Mostly cloudy. High near 61, with temperatures falling to around 56 in the afternoon. North northeast wind around 1 mph.
7-day forecast for Cornelius
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 61°F | Mostly Cloudy | 1 mph NNE | 14% |
| Tonight | 36°F | Areas Of Fog | 0 mph | 5% |
| Wednesday | 56°F | Areas Of Fog then Light Rain Likely | 2 mph SSE | 69% |
| Wednesday Night | 43°F | Light Rain then Areas Of Fog | 2 mph S | 96% |
| Thursday | 58°F | Areas Of Fog then Partly Sunny | 2 mph W | 7% |
| Thursday Night | 43°F | Areas Of Fog | 0 mph | 61% |
| Friday | 58°F | Light Rain Likely | 2 mph E | 61% |
| Friday Night | 44°F | Slight Chance Light Rain then Areas Of Fog | 0 mph | 19% |
| Saturday | 62°F | Areas Of Fog then Slight Chance Light Rain | 1 mph E | 19% |
| Saturday Night | 47°F | Light Rain Likely | 1 to 13 mph S | 63% |
| Sunday | 59°F | Light Rain Likely | 0 to 6 mph SW | 60% |
| Sunday Night | 42°F | Areas Of Fog | 0 mph | 18% |
| Monday | 58°F | Areas Of Fog then Chance Light Rain | 2 mph SSE | 46% |
| Monday Night | 44°F | Light Rain Likely | 1 to 5 mph S | 55% |
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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West Slope
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 Nov 3, 2026.