The highest day temperature in May 2023 was 92°F. The lowest night temperature was 66°F. The average values for day and night temperatures during May were 87.1°F и 75.2°F respectivly.

The average sea surface temperature in May 2023 for Galveston was 81.5°F. The maximum and minimum values were 73.8°F and 86.4°F respectively.

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

Precipitation total in May for Galveston is 2.2 in. It makes may the most rainy month of the year.

The average wind speed in May is 10.1 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 in May is 7.8 hours.