Concord Weather in September

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

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

September is in the fall / autumn in Concord and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 13°C (55°F) is normal.

Concord weather averages (imperial / metric)
Daytime temperature 25.6°C 78.1°F
Nightly temperature 12.6°C 54.7°F
Average temperature 19.1°C 66.4°F
Daily sunshine 10.6 hrs
Avg rainfall 7 mm 0.3 ins
Rainy days 2 days
Sea temperature 14.4°C 57.9°F
Humidity 65%
Windspeed 15.5kph 10 mph

On average September is the 4th driest month of the year in Concord with around 7mm 0.3 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 Concord

Concord average temperature in September

September rainfall

Concord average rain in September

September hourly sunshine

Concord 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 Concord 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

Concord weather stats

Concord weather statistics
Hottest month: August 25.6°C 78.1°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.3hrs
Coldest month: January 12.8°C 55°F
Wettest month: January 113mm 4.4ins
Map showing location of Concord (37.97798, -122.03107) Concord map pin © Google

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