The highest day temperature in January 2026 was 85°F. The lowest night temperature was 28°F. The average values for day and night temperatures during January were 65.8°F и 56.8°F respectivly.

The average sea surface temperature in January 2026 for Mustang Island was 67.1°F. The maximum and minimum values were 59.4°F and 71.2°F respectively.

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

Precipitation total in January for Mustang Island is 0.5 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 12.3 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 Mustang Island in January is 5.7 hours.