Fossil, OR Weather & Growing Conditions
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 3 mph SE | 0% |
| Saturday | 75°F | Sunny | 2 to 6 mph SW | 0% |
| Saturday Night | 51°F | Partly Cloudy | 5 mph E | 0% |
| Sunday | 79°F | Sunny | 2 to 6 mph E | 0% |
| Sunday Night | 55°F | Mostly Clear | 2 to 6 mph E | 0% |
| Monday | 79°F | Sunny | 2 to 6 mph NW | 0% |
| Monday Night | 53°F | Mostly Clear | 2 to 6 mph NW | 0% |
| Tuesday | 75°F | Sunny | 2 to 7 mph W | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 2 to 7 mph NW | 0% |
| Wednesday | 72°F | Sunny | 2 to 6 mph W | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 2 to 6 mph NE | 0% |
| Thursday | 76°F | Mostly Sunny | 1 to 8 mph N | 1% |
| Thursday Night | 52°F | Partly Cloudy | 2 to 8 mph NW | 5% |
| Friday | 69°F | Mostly Sunny | 2 to 10 mph W | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fossil, OR
Last spring frost
Jun 3
First fall frost
Sep 14
Growing season
98 days
Hardiness zone
7a
Explore more for Fossil, OR: full frost dates · planting calendar · Oregon frost dates
Climate data from the nearest NOAA station, Fossil, Or (11.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.