The highest day temperature in January 2025 was 72°F. The lowest night temperature was 54°F. The average values for day and night temperatures during January were 68.5°F и 57.9°F respectivly.

The average sea surface temperature in January 2025 for San Antonio was 63.3°F. The maximum and minimum values were 60.2°F and 67.4°F respectively.

Almost all days in January are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in January for San Antonio is 0.1 in.

The average wind speed in January is 7.9 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Antonio in January is 12.8 hours.