Prineville Weather in September

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

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

September is in the fall / autumn in Prineville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 24°C (75°F), whilst at night 2°C (35°F) is normal.

Prineville weather averages (imperial / metric)
Daytime temperature 23.8°C 74.8°F
Nightly temperature 1.8°C 35.2°F
Average temperature 12.8°C 55°F
Daily sunshine 10.2 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 6 days
Sea temperature 13.6°C 56.5°F
Humidity 55%
Windspeed 11.9kph 7 mph

On average September is the driest month of the year in Prineville with around 9mm 0.4 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.2 hours of sunshine per day.

September temperatures in Prineville

Prineville average temperature in September

September rainfall

Prineville average rain in September

September hourly sunshine

Prineville 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 Prineville 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

Prineville weather stats

Prineville weather statistics
Hottest month: July 28.7°C 83.7°F
Driest month: September 9mm 0.4ins
Sunniest month: July 13.3hrs
Coldest month: January 4.9°C 40.8°F
Wettest month: December 26mm 1ins
Map showing location of Prineville (44.29985, -120.83447) Prineville map pin © Google

Locations nearby

Top United States locations