Galveston (TX)
September
Weather in Galveston, Texas for September 2026
Your guide to Galveston weather in September - trends and predictions
So far, September 2026 in Galveston is slightly warmer than the historical average by 0.9 °F.
The forecast for the next days in Galveston predicts temperatures to be around 30 °F, close to the historical average.
In general, the average temperature in Galveston at the beginning of September is 30 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.4 °F by the end of September.
The climate of Galveston in September is notably wet, with an average of 13 rainy days, and a total of 185.1 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
13
Rainy days
0
Snow days
29°/26°
Temperatures
23 km/h
Avg max wind
74 %
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° /25° | 26.4 mm | 4 | |
| Sept. 2 |  Moderate or heavy rain shower | 31° /27° | 12 mm | 5 | |
| Sept. 3 |  Sunny | 31° /27° | 0 mm | 5 | |
| Sept. 4 | Sunny | 29° /26° | 119.1 mm | 6 | |
| Sept. 5 |  Overcast | 29° /26° | 462.6 mm | 4 | |
| Sept. 6 |  Moderate or heavy rain with thunder | 30° /26° | 64.5 mm | 5 | |
| Sept. 7 |  Thundery outbreaks possible | 31° /26° | 363.3 mm | 7 | |
| Sept. 8 | Sunny | 30° /26° | 0 mm | 7 | |
| Sept. 9 | Sunny | 29° /24° | 1.7 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 28° /25° | 8.9 mm | 6 | |
| Sept. 11 | Moderate or heavy rain shower | 28° /25° | 41.8 mm | 5 | |
| Sept. 12 | Patchy rain possible | 30° /26° | 47.6 mm | 6 | |
| Sept. 13 | Sunny | 29° /26° | 3.1 mm | 8 | |
| Sept. 14 | Sunny | 29° /27° | 2.4 mm | 8 | |
| Sept. 15 | Sunny | 30° /27° | 0.2 mm | 7 | |
| Sept. 16 | Sunny | 29° /26° | 0 mm | 5 | |
| Sept. 17 | Light rain shower | 31° /30° | 20.8 mm | 8 | |
| Sept. 18 | Sunny | 31° /29° | 0.1 mm | 7 | |
| Sept. 19 | Sunny | 30° /29° | 0 mm | 7 | |
| Sept. 20 | Sunny | 30° /29° | 1.4 mm | 7 | |
| Sept. 21 | Overcast | 30° /28° | 2.8 mm | 6 | |
| Sept. 22 | Sunny | 29° /29° | 0.9 mm | 7 | |
| Sept. 23 | Sunny | 29° /29° | 0 mm | 7 | |
| Sept. 24 | Sunny | 30° /28° | 0 mm | 7 | |
| Sept. 25 | Sunny | 30° /26° | 0 mm | 7 | |
| Sept. 26 | Sunny | 29° /23° | 0 mm | 7 | |
| Sept. 27 | Sunny | 27° /24° | 0 mm | 7 | |
| Sept. 28 | Sunny | 29° /25° | 0 mm | 7 | |
| Sept. 29 | Sunny | 30° /25° | 0 mm | 8 | |
| Sept. 30 | Overcast | 31° /26° | 0 mm | 8 | |
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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 29° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Galveston during September?
Significant rainfall exceeding 185.1 mm is expected in Galveston during September, occurring over more than 13 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 23 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 💧
Typically, Galveston has 13 rainy days in September with a total of 185.1 mm of rainfall.
UV exposure in Galveston during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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