Galveston Island (TX)
September
Weather in Galveston Island, Texas for September 2025
Your guide to Galveston Island weather in September - trends and predictions
In general, the average temperature in Galveston Island at the beginning of September is 27.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.3 °F by the end of September.
The climate of Galveston Island in September is notably wet, with an average of 14 rainy days, and a total of 210.8 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
14
Rainy days
0
Snow days
28°/26°
Temperatures
27 km/h
Avg max wind
78 %
Avg humidity
Galveston Island Weather September
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Temperatures trend during September in Galveston Island
See the weather trend as well as the moving average line
September weather in Galveston Island day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate or heavy rain shower | 27° /26° | 22.3 mm | 6 | |
| Sept. 2 | Moderate or heavy rain shower | 29° /27° | 33.4 mm | 6 | |
| Sept. 3 |  Patchy rain possible | 29° /28° | 1.8 mm | 6 | |
| Sept. 4 | Moderate or heavy rain shower | 28° /27° | 51.3 mm | 6 | |
| Sept. 5 | Moderate or heavy rain shower | 27° /25° | 58 mm | 6 | |
| Sept. 6 | Patchy rain possible | 27° /24° | 2.7 mm | 6 | |
| Sept. 7 |  Partly cloudy | 28° /24° | 0.1 mm | 7 | |
| Sept. 8 | Partly cloudy | 27° /23° | 0 mm | 7 | |
| Sept. 9 |  Sunny | 27° /22° | 0 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 26° /24° | 8.2 mm | 6 | |
| Sept. 11 | Moderate or heavy rain shower | 26° /24° | 16.7 mm | 6 | |
| Sept. 12 | Patchy rain possible | 27° /24° | 0.8 mm | 6 | |
| Sept. 13 | Sunny | 27° /25° | 0 mm | 7 | |
| Sept. 14 | Sunny | 28° /26° | 0 mm | 7 | |
| Sept. 15 | Sunny | 28° /26° | 0 mm | 7 | |
| Sept. 16 | Sunny | 28° /25° | 0 mm | 7 | |
| Sept. 17 |  Overcast | 27° /26° | 0.2 mm | 6 | |
| Sept. 18 | Overcast | 28° /26° | 0 mm | 6 | |
| Sept. 19 | Patchy rain possible | 27° /26° | 0.1 mm | 6 | |
| Sept. 20 | Moderate rain at times | 27° /25° | 0.7 mm | 6 | |
| Sept. 21 |  Cloudy | 28° /26° | 0 mm | 6 | |
| Sept. 22 | Cloudy | 28° /27° | 0 mm | 6 | |
| Sept. 23 | Patchy rain possible | 29° /28° | 0.4 mm | 6 | |
| Sept. 24 | Moderate rain at times | 29° /27° | 6 mm | 6 | |
| Sept. 25 | Patchy rain possible | 29° /27° | 3 mm | 6 | |
| Sept. 26 | Cloudy | 29° /25° | 5.1 mm | 6 | |
| Sept. 27 | Sunny | 29° /25° | 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 | |
| Next | |||||
Important Notice
Our weather forecast for Galveston Island 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 Island forecast closer to your planned date for the most up-to-date weather information.
Change Month
Galveston Island in September - FAQ
What are the expected maximum and minimum temperatures in Galveston Island 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 Island during September?
Significant rainfall exceeding 210.8 mm is expected in Galveston Island during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Galveston Island during September?
The average wind speed in Galveston Island during September is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Galveston Island
Explore the daily rainfall trends and prepare for Galveston Islands September weather 💧
UV exposure in Galveston Island during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Galveston Island?Get accurate weather forecasts for Galveston Island, located at latitude 29.222 and longitude -94.909. Stay updated with localized weather information tailored for Galveston Island.
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