Temperature for October
In San Nicolas Island, CA during October the average high temperature is 71.7°F. The hottest day on record was October 1, 2012 when the temperature hit 111.9°F.
Precipitation for October
In October the average monthly rainfall in San Nicolas Island, CA is 0.46 inches with rain usually falling on between 1 and 2 days. 1943 was the driest October with only 0.00 inches of rain falling, and 1987 was the wettest October with 2.21 inches of rain. The wettest single day in October was 23 October 1987 when 1.42 inches of rain fell.
In October there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in October.