Galveston (TX)
September
Weather in Galveston, Texas for September 2026
Your guide to Galveston weather in September - trends and predictions
In general, the average temperature in Galveston at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29 °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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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
28°/26°
Temperatures
24 km/h
Avg max wind
77 %
Avg humidity
Galveston Weather September
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Temperatures trend during September in Galveston
See the weather trend as well as the moving average line
September weather in Galveston day by day
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| 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 | Sunny | 29° /26° | 0 mm | 7 | |
| Sept. 16 | Sunny | 29° /25° | 0 mm | 7 | |
| Sept. 17 | Overcast | 29° /26° | 2.1 mm | 7 | |
| Sept. 18 | Overcast | 29° /26° | 0 mm | 6 | |
| Sept. 19 | Patchy rain possible | 28° /26° | 0.1 mm | 7 | |
| Sept. 20 | Moderate rain at times | 28° /26° | 0.3 mm | 7 | |
| Sept. 21 |  Cloudy | 28° /26° | 4.5 mm | 6 | |
| Sept. 22 | Cloudy | 28° /27° | 3.5 mm | 6 | |
| Sept. 23 | Patchy rain possible | 30° /28° | 9.8 mm | 7 | |
| Sept. 24 | Moderate rain at times | 29° /27° | 3 mm | 6 | |
| Sept. 25 | Patchy rain possible | 28° /26° | 7.8 mm | 6 | |
| Sept. 26 | Cloudy | 29° /25° | 2.5 mm | 7 | |
| Sept. 27 | Sunny | 29° /26° | 0 mm | 7 | |
| Sept. 28 | Sunny | 30° /25° | 0 mm | 8 | |
| Sept. 29 | Cloudy | 29° /25° | 0 mm | 7 | |
| Sept. 30 | Sunny | 29° /27° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Galveston in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Galveston forecast closer to your planned date for the most up-to-date weather information.
Change Month
Galveston in September - FAQ
What are the expected maximum and minimum temperatures in Galveston during September?
During September, expect a variety of temperatures with highs around 28° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Galveston during September?
Significant rainfall exceeding 177.6 mm is expected in Galveston during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Galveston during September?
The average wind speed in Galveston during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Galveston
Explore the daily rainfall trends and prepare for Galvestons September weather 💧
UV exposure in Galveston during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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