San Diego, CA Climate in January

Temperature for January

In San Diego, CA during January the average high temperature is 64.9°F. The hottest day on record was January 19, 2009 when the temperature hit 87.1°F.

San Diego, CA daily average and extreme temperature range for January

Low Temperature

During January the overnight temperature drops to an average of 49.1°F, with the lowest temperature of 32.4°F being recorded on January 13, 1963. In January it has never frozen overnight.

Precipitation for January

In January the average monthly rainfall in San Diego, CA is 1.66 inches with rain usually falling on between 7 and 8 days. 1948 was the driest January with only 0.00 inches of rain falling, and 2005 was the wettest January with 6.40 inches of rain. The wettest single day in January was 8 January 2005 when 2.82 inches of rain fell.

In January it usually snows on between 0 and 1 days. In January there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in January.