Jamestown Weather in May

What's the weather like in Jamestown (California) in May 2026?

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

May is in the spring in Jamestown and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 8°C (46°F) is normal.

Jamestown weather averages (imperial / metric)
Daytime temperature 25.6°C 78.1°F
Nightly temperature 8°C 46.4°F
Average temperature 16.8°C 62.2°F
Daily sunshine 13.4 hrs
Avg rainfall 16 mm 0.6 ins
Rainy days 2 days
Sea temperature 12.7°C 54.8°F
Humidity 49%
Windspeed 15.5kph 10 mph

On average May is the 5th driest month of the year in Jamestown with around 16mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.

On the flip side this corresponds to an average of 13.4 hours of sunshine per day.

May temperatures in Jamestown

Jamestown average temperature in May

May rainfall

Jamestown average rain in May

May hourly sunshine

Jamestown 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 Jamestown 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

Jamestown weather stats

Jamestown weather statistics
Hottest month: July 34.1°C 93.4°F
Driest month: July 2mm 0.1ins
Sunniest month: July 14.6hrs
Coldest month: December 11.2°C 52.2°F
Wettest month: January 132mm 5.2ins
Map showing location of Jamestown (37.95326, -120.4227) Jamestown map pin © Google

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