The highest day temperature in January 2025 was 68°F. The lowest night temperature was 34°F. The average values for day and night temperatures during January were 52.2°F и 50.8°F respectivly.

The average sea surface temperature in January 2025 for Galveston Island was 57.7°F. The maximum and minimum values were 49.4°F and 67.8°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Galveston Island is 1.3 in.

The average wind speed in January is 11.2 mph. It makes January one of the most windy months of the year for Galveston Island.

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 Galveston Island in January is 5.6 hours.