San Nicolas Island, CA Climate in September

Temperature for September

In San Nicolas Island, CA during September the average high temperature is 73.2°F. The hottest day on record was September 23, 2012 when the temperature hit 100.9°F.

San Nicolas Island, CA daily average and extreme temperature range for September

Low Temperature

During September the overnight temperature drops to an average of 58.9°F, with the lowest temperature of 36.0°F being recorded on September 28, 1992. In September it has never frozen overnight.

Precipitation for September

In September the average monthly rainfall in San Nicolas Island, CA is 0.23 inches with rain usually falling on between 1 and 2 days. 2012 was the driest September with only 0.00 inches of rain falling, and 1980 was the wettest September with 1.46 inches of rain. The wettest single day in September was 11 September 1976 when 0.43 inches of rain fell.

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