Weather in Galveston, Texas for September 2025
Meteorological - Air Quality Alert - See hour by hour.
Until now, September 2025 in Galveston has been nearly identical to the historical average, with a temperature of 29.1 °F (showing only a slight deviation of 0.4 °F).
The forecast for the next days in Galveston predicts temperatures to be around 28 °F, close to the historical average.
In general, the average temperature in Galveston at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.4 °F by the end of September.
The climate of Galveston in September is notably wet, with an average of 12 rainy days, and a total of 177.6 mm of precipitation.
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Galveston Weather September
Temperatures trend during September in Galveston
September weather in Galveston day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 29° /26° | 25.8 mm | 6 | |
| Sept. 2 |  Moderate or heavy rain shower | 30° /28° | 24 mm | 7 | |
| Sept. 3 |  Sunny | 31° /28° | 0 mm | 8 | |
| Sept. 4 | Sunny | 29° /27° | 11.3 mm | 7 | |
| Sept. 5 |  Overcast | 28° /27° | 0 mm | 6 | |
| Sept. 6 |  Moderate or heavy rain with thunder | 29° /28° | 75.3 mm | 6 | |
| Sept. 7 |  Thundery outbreaks possible | 29° /27° | 0 mm | 6 | |
| Sept. 8 | Sunny | 28° /25° | 0 mm | 7 | |
| Sept. 9 | Sunny | 28° /23° | 0 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 27° /25° | 4.1 mm | 7 | |
| Sept. 11 | Moderate or heavy rain shower | 28° /26° | 10.5 mm | 6 | |
| Sept. 12 | Patchy rain possible | 29° /26° | 0.4 mm | 7 | |
| Sept. 13 | Sunny | 28° /26° | 0 mm | 7 | |
| Sept. 14 | Sunny | 28° /26° | 0 mm | 7 | |
| Sept. 15 |  Cloudy | 29° /28° | 0 mm | 2 | |
| Sept. 16 | Sunny | 30° /26° | 0 mm | 2 | |
| Sept. 17 | Sunny | 29° /27° | 0 mm | 2 | |
| Sept. 18 | Sunny | 29° /28° | 0 mm | 2 | |
| Sept. 19 | Patchy rain possible | 28° /28° | 0.8 mm | 0 | |
| Sept. 20 | Patchy rain possible | 28° /27° | 1.4 mm | 6 | |
| Sept. 21 |  Partly cloudy | 28° /27° | 0 mm | 7 | |
| Sept. 22 | Patchy rain possible | 28° /27° | 1.1 mm | 6 | |
| Sept. 23 |  Moderate rain | 27° /26° | 6.3 mm | 6 | |
| Sept. 24 | Patchy rain possible | 27° /26° | 1.3 mm | 6 | |
| Sept. 25 | Sunny | 28° /26° | 0 mm | 7 | |
| Sept. 26 | Sunny | 27° /26° | 0 mm | 7 | |
| Sept. 27 | Sunny | 28° /27° | 0 mm | 7 | |
| Sept. 28 | Sunny | 31° /25° | 0 mm | 8 | |
| Sept. 29 | Cloudy | 29° /25° | 0 mm | 6 | |
| Sept. 30 | Sunny | 29° /27° | 0 mm | 7 | |
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Galveston in September - FAQ
September rainfall patterns in Galveston
UV exposure in Galveston during September
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Where is Galveston?Get accurate weather forecasts for Galveston, located at latitude 29.301 and longitude -94.798. Stay updated with localized weather information tailored for Galveston.