Napa Weather in May

What's the weather like in Napa (California) in May 2024?

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

May is in the spring in Napa and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 9°C (47°F) is normal.

Napa weather averages (imperial / metric)
Daytime temperature 22.9°C 73.2°F
Nightly temperature 8.5°C 47.3°F
Average temperature 15.7°C 60.3°F
Daily sunshine 12.2 hrs
Avg rainfall 14 mm 0.5 ins
Rainy days 3 days
Sea temperature 11.8°C 53.2°F
Humidity 66%
Windspeed 18.7kph 12 mph

On average May is the 5th driest month of the year in Napa with around 14mm 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 12.2 hours of sunshine per day.

May temperatures in Napa

Napa average temperature in May

May rainfall

Napa average rain in May

May hourly sunshine

Napa 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 Napa in May 2024.