O'Brien, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for O'Brien, a community in Josephine County, Oregon.
This Afternoon
62°F
Partly Sunny
Partly sunny. High near 62, with temperatures falling to around 57 in the afternoon. Southwest wind 2 to 6 mph.
7-day forecast for O'Brien
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Partly Sunny | 2 to 6 mph SW | 9% |
| Tonight | 34°F | Mostly Clear | 3 mph WNW | 4% |
| Wednesday | 62°F | Partly Sunny then Chance Light Rain | 1 to 7 mph SSW | 39% |
| Wednesday Night | 37°F | Chance Light Rain | 0 to 5 mph S | 46% |
| Thursday | 65°F | Mostly Sunny | 1 mph NNE | 1% |
| Thursday Night | 36°F | Partly Cloudy | 0 mph | 2% |
| Friday | 70°F | Mostly Sunny | 0 mph | 3% |
| Friday Night | 37°F | Mostly Clear | 2 mph E | 1% |
| Saturday | 72°F | Mostly Sunny | 1 to 6 mph S | 4% |
| Saturday Night | 40°F | Chance Light Rain | 2 to 14 mph SSW | 48% |
| Sunday | 64°F | Chance Light Rain | 2 mph WSW | 48% |
| Sunday Night | 38°F | Mostly Cloudy then Slight Chance Light Rain | 1 mph SE | 21% |
| Monday | 64°F | Chance Light Rain | 2 mph SSW | 27% |
| Monday Night | 37°F | Chance Light Rain | 3 mph SSW | 29% |
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 Nov 4, 2026.