The highest day temperature in June 2026 was 94°F. The lowest night temperature was 80°F. The average values for day and night temperatures during June were 89.2°F и 82.7°F respectivly.

The average sea surface temperature in June 2026 for Galveston Island was 88.1°F. The maximum and minimum values were 86.0°F and 89.2°F respectively.

Most of the days in June are sunny but you can also expect cloudy and gloomy days.

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

The average wind speed in June is 10.8 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 June is 8.8 hours.