The highest day temperature in January 2026 was 76°F. The lowest night temperature was 28°F. The average values for day and night temperatures during January were 60.6°F и 54.0°F respectivly.

The average sea surface temperature in January 2026 for Galveston Island was 62.2°F. The maximum and minimum values were 54.2°F and 67.8°F respectively.

You can expect various weather conditions during January. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in January for Galveston Island is 1.3 in.

The average wind speed in January is 11.4 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 5.7 hours.