O'Brien, OR Weather & Growing Conditions
Tonight
32°F
Mostly Clear
Mostly clear. Low around 32, with temperatures rising to around 34 overnight. South wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 32°F | Mostly Clear | 0 to 3 mph S | 2% |
| Wednesday | 59°F | Partly Sunny then Chance Light Rain | 0 to 7 mph SSW | 41% |
| Wednesday Night | 35°F | Chance Light Rain | 0 to 7 mph S | 39% |
| Thursday | 61°F | Mostly Sunny | 2 mph NNE | 1% |
| Thursday Night | 34°F | Partly Cloudy | 0 to 3 mph E | 1% |
| Friday | 65°F | Mostly Sunny | 1 mph ENE | 3% |
| Friday Night | 35°F | Mostly Clear | 0 to 3 mph E | 1% |
| Saturday | 68°F | Mostly Sunny | 1 to 5 mph S | 4% |
| Saturday Night | 37°F | Chance Light Rain | 3 to 14 mph SSW | 47% |
| Sunday | 60°F | Chance Light Rain | 0 to 3 mph WSW | 47% |
| Sunday Night | 36°F | Mostly Cloudy then Slight Chance Light Rain | 2 mph ESE | 21% |
| Monday | 60°F | Chance Light Rain | 2 mph SSW | 26% |
| Monday Night | 35°F | Chance Light Rain | 1 to 5 mph S | 28% |
| Tuesday | 63°F | Chance Light Rain | 2 mph S | 34% |
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 (10.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.