Long Beach Weather in September

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

The climate in Long Beach during September can be summarized as warm, humid and very dry.

September is in the fall / autumn in Long Beach and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 18°C (64°F) is normal.

Long Beach weather averages (imperial / metric)
Daytime temperature 27.2°C 81°F
Nightly temperature 17.8°C 64°F
Average temperature 22.5°C 72.5°F
Daily sunshine 9.7 hrs
Avg rainfall 6 mm 0.2 ins
Rainy days 2 days
Sea temperature 19.6°C 67.2°F
Humidity 72%
Windspeed 11.9kph 7 mph

On average September is the 5th driest month of the year in Long Beach 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 9.7 hours of sunshine per day.

September temperatures in Long Beach

Long Beach average temperature in September

September rainfall

Long Beach average rain in September

September hourly sunshine

Long Beach 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 Long Beach 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

Long Beach weather stats

Long Beach weather statistics
Hottest month: August 27.7°C 81.9°F
Driest month: July 1mm 0ins
Sunniest month: August 11.5hrs
Coldest month: January 19.3°C 66.7°F
Wettest month: January 61mm 2.4ins
Map showing location of Long Beach (33.76696, -118.18923) Long Beach map pin © Google

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