Ritzville Weather in September

What's the weather like in Ritzville (Washington) in September 2025?

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

September is in the fall / autumn in Ritzville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 7°C (44°F) is normal.

Ritzville weather averages (imperial / metric)
Daytime temperature 24.3°C 75.7°F
Nightly temperature 6.8°C 44.2°F
Average temperature 15.5°C 59.9°F
Daily sunshine 9.3 hrs
Avg rainfall 14 mm 0.6 ins
Rainy days 5 days
Sea temperature 12.7°C 54.9°F
Humidity 53%
Windspeed 13kph 8 mph

On average September is the 3rd driest month of the year in Ritzville with around 14mm 0.6 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 9.3 hours of sunshine per day.

September temperatures in Ritzville

Ritzville average temperature in September

September rainfall

Ritzville average rain in September

September hourly sunshine

Ritzville 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 Ritzville 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

Ritzville weather stats

Ritzville weather statistics
Hottest month: July 29.2°C 84.6°F
Driest month: July 10mm 0.4ins
Sunniest month: July 12.7hrs
Coldest month: January 1.3°C 34.3°F
Wettest month: December 41mm 1.6ins
Map showing location of Ritzville (47.12737, -118.37998) Ritzville map pin © Google

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