San Clemente Island, CA Climate in August

Temperature for August

In San Clemente Island, CA during August the average high temperature is 71.6°F. The hottest day on record was August 15, 1983 when the temperature hit 86.0°F.

San Clemente Island, CA daily average and extreme temperature range for August

Low Temperature

During August the overnight temperature drops to an average of 62.4°F, with the lowest temperature of 54.0°F being recorded on August 26, 1987. In August it has never frozen overnight.

Precipitation for August

In August the average monthly rainfall in San Clemente Island, CA is 0.07 inches with rain usually falling on between 1 and 2 days. 2012 was the driest August with only 0.00 inches of rain falling, and 1977 was the wettest August with 1.22 inches of rain. The wettest single day in August was 17 August 1977 when 1.22 inches of rain fell.

In August there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in August.