Three Rivers, OR Weather & Growing Conditions
Tonight
40°F
Mostly Clear
Mostly clear, with a low around 40. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Mostly Clear | 5 mph NE | 0% |
| Saturday | 68°F | Sunny | 5 mph S | 0% |
| Saturday Night | 45°F | Partly Cloudy | 2 to 7 mph E | 0% |
| Sunday | 72°F | Sunny | 3 to 7 mph E | 0% |
| Sunday Night | 47°F | Mostly Clear | 5 mph NE | 0% |
| Monday | 69°F | Sunny | 2 to 7 mph NW | 0% |
| Monday Night | 44°F | Partly Cloudy | 1 to 7 mph N | 0% |
| Tuesday | 64°F | Mostly Sunny | 1 to 8 mph NW | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Wednesday | 66°F | Mostly Sunny | 2 to 6 mph SE | 0% |
| Wednesday Night | 44°F | Partly Cloudy | 2 to 6 mph NE | 0% |
| Thursday | 68°F | Mostly Sunny | 7 mph S | 3% |
| Thursday Night | 42°F | Mostly Cloudy | 3 to 7 mph NW | 10% |
| Friday | 56°F | Mostly Sunny | 7 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Three Rivers, OR
Last spring frost
Jun 7
First fall frost
Sep 18
Growing season
100 days
Hardiness zone
6b
Explore more for Three Rivers, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Wickiup Dam, Or (17.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.