O'Brien, OR Weather & Growing Conditions
This Afternoon
83°F
Sunny
Sunny. High near 83, with temperatures falling to around 81 in the afternoon. West wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Sunny | 6 mph W | 0% |
| Tonight | 46°F | Clear | 1 to 6 mph SSW | 0% |
| Saturday | 87°F | Sunny | 0 to 7 mph W | 0% |
| Saturday Night | 49°F | Partly Cloudy | 1 to 7 mph SSW | 0% |
| Sunday | 88°F | Mostly Sunny | 1 to 6 mph NNE | 0% |
| Sunday Night | 49°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Monday | 85°F | Sunny | 1 to 6 mph NNE | 0% |
| Monday Night | 46°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Tuesday | 83°F | Sunny | 1 to 6 mph NNE | 0% |
| Tuesday Night | 44°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Wednesday | 84°F | Sunny | 3 mph NNE | 0% |
| Wednesday Night | 48°F | Mostly Clear | 0 to 3 mph N | 0% |
| Thursday | 85°F | Sunny | 0 to 5 mph WNW | 3% |
| Thursday Night | 47°F | Partly Cloudy | 0 to 5 mph SW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for O'Brien, OR
Last spring frost
May 1
First fall frost
Oct 12
Growing season
161 days
Hardiness zone
8b
Explore more for O'Brien, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Cave Junction 1 Wnw, Or (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.