Cupertino Weather in September

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

The climate in Cupertino during September can be summarized as mild and very dry.

September is in the fall / autumn in Cupertino and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 11°C (51°F) is normal.

Cupertino weather averages (imperial / metric)
Daytime temperature 24.3°C 75.7°F
Nightly temperature 10.7°C 51.3°F
Average temperature 17.5°C 63.5°F
Daily sunshine 10.1 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 2 days
Sea temperature 14.4°C 57.9°F
Humidity 69%
Windspeed 15.5kph 10 mph

On average September is the 4th driest month of the year in Cupertino 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 10.1 hours of sunshine per day.

September temperatures in Cupertino

Cupertino average temperature in September

September rainfall

Cupertino average rain in September

September hourly sunshine

Cupertino 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 Cupertino 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

Cupertino weather stats

Cupertino weather statistics
Hottest month: August 24.3°C 75.7°F
Driest month: July 3mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: December 12.8°C 55°F
Wettest month: January 156mm 6.1ins
Map showing location of Cupertino (37.323, -122.03218) Cupertino map pin © Google

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