The highest day temperature in December 2023 was 75°F. The lowest night temperature was 47°F. The average values for day and night temperatures during December were 61.8°F и 59.6°F respectivly.

The average sea surface temperature in December 2023 for Galveston Island was 63.0°F. The maximum and minimum values were 59.2°F and 66.4°F respectively.

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

Precipitation total in December for Galveston Island is 0.9 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 9.7 mph.

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 December is 5.8 hours.