Fremont Weather in September

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

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

September is in the fall / autumn in Fremont and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 12°C (53°F) is normal.

Fremont weather averages (imperial / metric)
Daytime temperature 27.2°C 81°F
Nightly temperature 11.8°C 53.2°F
Average temperature 19.5°C 67.1°F
Daily sunshine 10.6 hrs
Avg rainfall 6 mm 0.2 ins
Rainy days 2 days
Sea temperature 14.9°C 58.9°F
Humidity 65%
Windspeed 15.5kph 10 mph

On average September is the 4th driest month of the year in Fremont with around 6mm 0.2 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.6 hours of sunshine per day.

September temperatures in Fremont

Fremont average temperature in September

September rainfall

Fremont average rain in September

September hourly sunshine

Fremont 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 Fremont 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

Fremont weather stats

Fremont weather statistics
Hottest month: August 27.8°C 82°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.3hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 94mm 3.7ins
Map showing location of Fremont (37.54827, -121.98857) Fremont map pin © Google

Locations nearby

Top United States locations