Fossil, OR Weather & Growing Conditions
This Afternoon
49°F
Mostly Cloudy
Mostly cloudy. High near 49, with temperatures falling to around 43 in the afternoon. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Mostly Cloudy | 5 mph NW | 1% |
| Tonight | 34°F | Partly Cloudy | 0 to 3 mph SW | 1% |
| Wednesday | 52°F | Sunny | 1 to 5 mph SW | 7% |
| Wednesday Night | 40°F | Chance Rain Showers | 1 to 5 mph SW | 50% |
| Thursday | 51°F | Mostly Sunny | 1 to 5 mph SW | 3% |
| Thursday Night | 39°F | Partly Cloudy | 1 to 10 mph SE | 5% |
| Friday | 55°F | Mostly Cloudy | 2 to 8 mph SE | 5% |
| Friday Night | 40°F | Partly Cloudy | 2 to 9 mph SE | 1% |
| Saturday | 61°F | Mostly Sunny | 2 to 7 mph SE | 1% |
| Saturday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 15 mph SE | 18% |
| Sunday | 55°F | Slight Chance Rain Showers | 2 to 9 mph SW | 18% |
| Sunday Night | 40°F | Mostly Cloudy | 3 mph E | 7% |
| Monday | 54°F | Mostly Cloudy | 2 mph NE | 8% |
| Monday Night | 42°F | Mostly Cloudy | 1 to 9 mph SE | 13% |
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 Nov 4, 2026.