Marysville Weather in September

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

The climate in Marysville during September can be summarized as warm and very dry.

September is in the fall / autumn in Marysville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 32°C (89°F), whilst at night 13°C (56°F) is normal.

Marysville weather averages (imperial / metric)
Daytime temperature 31.6°C 88.8°F
Nightly temperature 13.3°C 55.9°F
Average temperature 22.4°C 72.3°F
Daily sunshine 12.4 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 2 days
Sea temperature 14.8°C 58.7°F
Humidity 56%
Windspeed 12.2kph 8 mph

On average September is the 4th driest month of the year in Marysville 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 12.4 hours of sunshine per day.

September temperatures in Marysville

Marysville average temperature in September

September rainfall

Marysville average rain in September

September hourly sunshine

Marysville 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 Marysville 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

Marysville weather stats

Marysville weather statistics
Hottest month: July 34.9°C 94.8°F
Driest month: July 1mm 0ins
Sunniest month: July 15.1hrs
Coldest month: January 11.9°C 53.4°F
Wettest month: January 112mm 4.4ins
Map showing location of Marysville (39.14573, -121.59135) Marysville map pin © Google

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