San Bernardino Weather in September

What's the weather like in San Bernardino (California) in September 2024?

The climate in San Bernardino during September can be summarized as hot and very dry.

September is in the fall / autumn in San Bernardino and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 32°C (90°F), whilst at night 15°C (59°F) is normal.

San Bernardino weather averages (imperial / metric)
Daytime temperature 32.2°C 89.9°F
Nightly temperature 14.9°C 58.7°F
Average temperature 23.5°C 74.3°F
Daily sunshine 10.4 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 1 days
Sea temperature 19.6°C 67.3°F
Humidity 59%
Windspeed 13kph 8 mph

On average September is the 4th driest month of the year in San Bernardino 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 10.4 hours of sunshine per day.

September temperatures in San Bernardino

San Bernardino average temperature in September

September rainfall

San Bernardino average rain in September

September hourly sunshine

San Bernardino 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 San Bernardino in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Bernardino weather stats

San Bernardino weather statistics
Hottest month: August 34.6°C 94.3°F
Driest month: July 2mm 0.1ins
Sunniest month: August 11.7hrs
Coldest month: January 18.6°C 65.5°F
Wettest month: January 70mm 2.8ins
Map showing location of San Bernardino (34.10834, -117.28977) San Bernardino map pin © Google

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