Fossil, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fossil, a city in Wheeler County, Oregon.
This Afternoon
52°F
Mostly Cloudy
Mostly cloudy. High near 52, with temperatures falling to around 43 in the afternoon. North wind 3 to 7 mph.
7-day forecast for Fossil
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Mostly Cloudy | 3 to 7 mph N | 1% |
| Tonight | 34°F | Mostly Clear | 2 mph SW | 1% |
| Wednesday | 55°F | Sunny | 0 to 3 mph SW | 8% |
| Wednesday Night | 41°F | Mostly Cloudy then Rain Showers Likely | 0 to 6 mph SW | 57% |
| Thursday | 53°F | Mostly Sunny | 2 to 8 mph SW | 3% |
| Thursday Night | 40°F | Partly Cloudy | 1 to 8 mph SE | 6% |
| Friday | 58°F | Mostly Cloudy | 2 to 8 mph S | 6% |
| Friday Night | 42°F | Mostly Cloudy | 2 to 8 mph SE | 1% |
| Saturday | 64°F | Mostly Sunny | 3 to 10 mph SE | 1% |
| Saturday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 3 to 15 mph S | 18% |
| Sunday | 58°F | Slight Chance Rain Showers | 2 to 12 mph SW | 18% |
| Sunday Night | 40°F | Mostly Cloudy | 0 to 3 mph E | 8% |
| Monday | 57°F | Mostly Cloudy | 0 to 3 mph S | 10% |
| Monday Night | 43°F | Mostly Cloudy | 0 to 8 mph SE | 12% |
Forecast source: National Weather Service (api.weather.gov) for Fossil (44.998, -120.215). Updated through the day.
Growing snapshot for Fossil
Last spring frost
Jun 3
First fall frost
Sep 14
Growing season
98 days
Hardiness zone
7a
More local growing data for Fossil: nearby ZIP 97830 weather · frost dates · planting calendar · Oregon frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fossil, Or (2.8 mi from Fossil). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.