The highest day temperature in September 2023 was 112°F. The lowest night temperature was 78°F. The average values for day and night temperatures during September were 101.2°F и 84.4°F respectivly.

The average sea surface temperature in September 2023 for Houston was 90.1°F. The maximum and minimum values were 88.0°F and 92.8°F respectively.

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

Precipitation total in September for Houston is 4.3 in.

The average wind speed in September is 7.0 mph. It makes September the most windless month of the year for Houston.

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 Houston in September is 7.6 hours.