O'Brien, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for O'Brien, a community in Josephine County, Oregon.
Today
106°F
Areas Of Smoke
Areas of smoke before 2pm. Sunny, with a high near 106. North wind around 6 mph.
7-day forecast for O'Brien
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 106°F | Areas Of Smoke | 6 mph N | 0% |
| Tonight | 62°F | Areas Of Smoke | 2 to 6 mph N | 0% |
| Wednesday | 104°F | Sunny | 2 to 9 mph ENE | 0% |
| Wednesday Night | 61°F | Clear | 0 to 9 mph W | 0% |
| Thursday | 102°F | Sunny | 0 to 7 mph NW | 0% |
| Thursday Night | 59°F | Clear | 0 to 7 mph NW | 0% |
| Friday | 102°F | Sunny | 0 to 7 mph NNW | 0% |
| Friday Night | 60°F | Clear | 1 to 7 mph N | 0% |
| Saturday | 98°F | Sunny | 1 to 8 mph NNE | 0% |
| Saturday Night | 56°F | Clear | 2 to 9 mph NNE | 0% |
| Sunday | 92°F | Sunny | 2 to 12 mph NE | 0% |
| Sunday Night | 53°F | Clear | 3 to 14 mph NNE | 0% |
| Monday | 91°F | Sunny | 3 to 12 mph NNE | 0% |
| Monday Night | 52°F | Clear | 2 to 12 mph NNE | 0% |
Forecast source: National Weather Service (api.weather.gov) for O'Brien (42.080, -123.705). Updated through the day.
Growing snapshot for O'Brien
Last spring frost
May 1
First fall frost
Oct 12
Growing season
161 days
Hardiness zone
8b
More local growing data for O'Brien: nearby ZIP 97534 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cave Junction 1 Wnw, Or (10.1 mi from O'Brien). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.