Harman US

O'Brien, OR Weather & Growing Conditions

Overnight
45°F
Clear
Clear. Low around 45, with temperatures rising to around 47 overnight. West southwest wind around 2 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 45°F Clear 2 mph WSW 0%
Saturday 84°F Sunny 0 to 9 mph WNW 0%
Saturday Night 46°F Partly Cloudy 1 to 9 mph ESE 0%
Sunday 86°F Mostly Sunny 1 to 6 mph N 0%
Sunday Night 48°F Mostly Clear 2 to 6 mph NE 0%
Monday 84°F Sunny 2 to 6 mph NNE 0%
Monday Night 46°F Mostly Clear 3 to 8 mph NE 0%
Tuesday 81°F Sunny 5 mph NNE 0%
Tuesday Night 43°F Mostly Clear 2 to 6 mph NNE 0%
Wednesday 80°F Sunny 3 mph NNE 0%
Wednesday Night 44°F Partly Cloudy 2 to 6 mph NNE 0%
Thursday 78°F Mostly Sunny 5 mph NNW 1%
Thursday Night 43°F Partly Cloudy 2 to 6 mph N 4%
Friday 74°F Mostly Sunny 2 to 6 mph NNE 4%

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 Sep 19, 2026.