Fossil Weather in September

What's the weather like in Fossil (Oregon) in September 2025?

The climate in Fossil during September can be summarized as mild and dry.

September is in the fall / autumn in Fossil and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 4°C (40°F) is normal.

Fossil weather averages (imperial / metric)
Daytime temperature 21.9°C 71.4°F
Nightly temperature 4.3°C 39.7°F
Average temperature 13.1°C 55.6°F
Daily sunshine 9.9 hrs
Avg rainfall 17 mm 0.7 ins
Rainy days 5 days
Sea temperature 13.6°C 56.5°F
Humidity 53%
Windspeed 12.6kph 8 mph

On average September is the 2nd driest month of the year in Fossil with around 17mm 0.7 inches of rain making it a dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.9 hours of sunshine per day.

September temperatures in Fossil

Fossil average temperature in September

September rainfall

Fossil average rain in September

September hourly sunshine

Fossil average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Fossil in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Fossil weather stats

Fossil weather statistics
Hottest month: July 26.9°C 80.4°F
Driest month: July 12mm 0.5ins
Sunniest month: July 13.1hrs
Coldest month: January 3.1°C 37.6°F
Wettest month: November 47mm 1.9ins
Map showing location of Fossil (44.99819, -120.21614) Fossil map pin © Google

Locations nearby

Top United States locations