San Antonio, TX Climate in January

Temperature for January

In San Antonio, TX during January the average high temperature is 63.5°F. The hottest day on record was January 26, 1975 when the temperature hit 90.0°F.

San Antonio, TX daily average and extreme temperature range for January

Low Temperature

During January the overnight temperature drops to an average of 42.3°F, with the lowest temperature of 3.9°F being recorded on January 31, 1949. On average there are 2 days in January when the temperature stays below freezing all day. In the worst January there were 2 days when the temperature did not make it above freezing. Overnight temperatures drop below freezing between 1 and 16 times in January.

Precipitation for January

In January the average monthly rainfall in San Antonio, TX is 0.85 inches with rain usually falling on between 10 and 11 days. 1939 was the driest January with only 0.00 inches of rain falling, and 1992 was the wettest January with 5.14 inches of rain. The wettest single day in January was 27 January 1992 when 2.36 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.