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
84°F
Sunny
Sunny. High near 84, with temperatures falling to around 82 in the afternoon. South southeast wind 1 to 8 mph.
7-day forecast for O'Brien
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Sunny | 1 to 8 mph SSE | 0% |
| Tonight | 47°F | Clear | 0 to 8 mph WSW | 0% |
| Saturday | 88°F | Sunny | 0 to 7 mph SSE | 0% |
| Saturday Night | 50°F | Partly Cloudy | 0 to 7 mph SW | 0% |
| Sunday | 90°F | Mostly Sunny | 1 to 5 mph NE | 0% |
| Sunday Night | 51°F | Mostly Clear | 2 mph NNE | 0% |
| Monday | 87°F | Sunny | 0 to 6 mph NNE | 0% |
| Monday Night | 48°F | Mostly Clear | 2 to 6 mph NE | 0% |
| Tuesday | 84°F | Sunny | 2 to 6 mph NNE | 0% |
| Tuesday Night | 46°F | Mostly Clear | 2 to 6 mph NE | 0% |
| Wednesday | 86°F | Sunny | 3 mph NNE | 0% |
| Wednesday Night | 49°F | Mostly Clear | 3 mph NE | 0% |
| Thursday | 86°F | Sunny | 0 to 5 mph NNW | 3% |
| Thursday Night | 49°F | Partly Cloudy | 1 to 5 mph ENE | 6% |
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 Sep 18, 2026.