The highest day temperature in September 2023 was 100°F. The lowest night temperature was 84°F. The average values for day and night temperatures during September were 95.1°F и 86.7°F respectivly.

The average sea surface temperature in September 2023 for Mustang Island was 91.0°F. The maximum and minimum values were 90.0°F and 92.2°F respectively.

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

Precipitation total in September for Mustang Island is 1.2 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 10.2 mph. It makes September the most windless month of the year for Mustang 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 Mustang Island in September is 7.9 hours.