Ukiah Weather in September

What's the weather like in Ukiah (California) in September 2025?

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

September is in the fall / autumn in Ukiah and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 8°C (47°F) is normal.

Ukiah weather averages (imperial / metric)
Daytime temperature 26.5°C 79.6°F
Nightly temperature 8.2°C 46.7°F
Average temperature 17.3°C 63.1°F
Daily sunshine 9.9 hrs
Avg rainfall 16 mm 0.6 ins
Rainy days 3 days
Sea temperature 13.8°C 56.8°F
Humidity 68%
Windspeed 14kph 9 mph

On average September is the 4th driest month of the year in Ukiah with around 16mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 3 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 Ukiah

Ukiah average temperature in September

September rainfall

Ukiah average rain in September

September hourly sunshine

Ukiah 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 Ukiah 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

Ukiah weather stats

Ukiah weather statistics
Hottest month: July 27.8°C 82°F
Driest month: July 3mm 0.1ins
Sunniest month: April 10.6hrs
Coldest month: January 11.8°C 53.2°F
Wettest month: January 233mm 9.2ins
Map showing location of Ukiah (39.15017, -123.20778) Ukiah map pin © Google

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