Cupertino Weather in May

What's the weather like in Cupertino (California) in May 2025?

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

May is in the spring in Cupertino and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 8°C (46°F) is normal.

Cupertino weather averages (imperial / metric)
Daytime temperature 19.7°C 67.5°F
Nightly temperature 7.5°C 45.5°F
Average temperature 13.6°C 56.5°F
Daily sunshine 11.6 hrs
Avg rainfall 12 mm 0.5 ins
Rainy days 3 days
Sea temperature 11.8°C 53.2°F
Humidity 67%
Windspeed 19.8kph 12 mph

On average May is the 5th driest month of the year in Cupertino with around 12mm 0.5 inches of rain making it a dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.

On the flip side this corresponds to an average of 11.6 hours of sunshine per day.

May temperatures in Cupertino

Cupertino average temperature in May

May rainfall

Cupertino average rain in May

May hourly sunshine

Cupertino average rain in May

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 May 2025.

Other monthly averages

Best places to visit in May

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

Locations nearby

Top United States locations