Fossil, OR Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fossil, a city in Wheeler County, Oregon.
This Afternoon
73°F
Sunny
Sunny, with a high near 73. Northwest wind around 6 mph.
7-day forecast for Fossil
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Sunny | 6 mph NW | 0% |
| Tonight | 51°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Saturday | 76°F | Sunny | 5 mph W | 0% |
| Saturday Night | 53°F | Partly Cloudy | 0 to 3 mph SE | 0% |
| Sunday | 80°F | Sunny | 0 to 8 mph E | 0% |
| Sunday Night | 56°F | Mostly Clear | 1 to 8 mph E | 0% |
| Monday | 80°F | Sunny | 1 to 7 mph W | 0% |
| Monday Night | 55°F | Partly Cloudy | 1 to 7 mph NW | 0% |
| Tuesday | 76°F | Sunny | 1 to 8 mph W | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 0 to 8 mph W | 0% |
| Wednesday | 73°F | Sunny | 2 to 6 mph W | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 1 to 6 mph NE | 0% |
| Thursday | 78°F | Mostly Sunny | 1 to 7 mph N | 1% |
| Thursday Night | 52°F | Partly Cloudy | 2 to 7 mph NW | 5% |
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 Sep 18, 2026.