Irvine Weather & Climate: Best Time to Visit

The climate in Irvine experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a pleasant 18°C (64°F) in August, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.

At night, you can expect temperatures ranging from 12°C (54°F) in August to around 3°C (37°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Irvine experiences significant rainfall throughout the year, averaging 1524 mm (60 in) of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 166 mm (6.5 in) of precipitation, spread over 20 rainy days.

In contrast, the driest month May experiences a drier climate, with about 87 mm (3.4 in) of rainfall spread across 16 rainy days. For more details, please visit our Irvine Precipitation page.

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

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Irvine. While May receives considerable daily sunshine with up to 6.3 hours, January marks the darkest time of the year, where sunshine is scarce with only 1.2 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 Irvine.

The city experiences its highest humidity in January, reaching 87%. In May, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year