Richmond (CA) Weather & Climate: Best Time to Visit

The weather in Richmond changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a comfortable 23°C (73°F) in September. In December, the coolest month of the year, temperatures drop to a moderate 15°C (59°F).

At night, temperatures range from around 13°C (55°F) in September to 6°C (43°F) in December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Richmond experiences moderate precipitation patterns, averaging 534 mm (21 in) yearly. Richmond can be quite wet during December, receiving approximately 116 mm (4.6 in) of precipitation over 13 rainy days.

In contrast, during the driest month (July), you will experience much drier conditions, with 0.1 mm (0 in) of precipitation spread across 0 rainy days. For more details, please visit our Richmond Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Richmond can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 10.8 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Richmond.

The city experiences its highest humidity in January, reaching 80%. In June, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year