Walnut Creek Weather in May

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

The climate in Walnut Creek during May can be summarized as mild and very dry.

May is in the spring in Walnut Creek and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 10°C (50°F) is normal.

Walnut Creek weather averages (imperial / metric)
Daytime temperature 21.7°C 71.1°F
Nightly temperature 9.7°C 49.5°F
Average temperature 15.7°C 60.3°F
Daily sunshine 12.1 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 2 days
Sea temperature 11.8°C 53.2°F
Humidity 65%
Windspeed 19.4kph 12 mph

On average May is the 5th driest month of the year in Walnut Creek 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 12.1 hours of sunshine per day.

May temperatures in Walnut Creek

Walnut Creek average temperature in May

May rainfall

Walnut Creek average rain in May

May hourly sunshine

Walnut Creek 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 Walnut Creek 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

Walnut Creek weather stats

Walnut Creek 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 Walnut Creek (37.90631, -122.06496) Walnut Creek map pin © Google

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