Temperature for August
In San Nicolas Island, CA during August the average high temperature is 72.7°F. The hottest day on record was August 27, 2009 when the temperature hit 108.0°F.
Precipitation for August
In August the average monthly rainfall in San Nicolas Island, CA is 0.27 inches with rain usually falling on between 0 and 1 days. 2012 was the driest August with only 0.00 inches of rain falling, and 1992 was the wettest August with 1.65 inches of rain. The wettest single day in August was 6 August 1992 when 1.65 inches of rain fell.
In August it usually snows on between 0 and 1 days. 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.