McAllen (TX)
September
Weather in McAllen, Texas for September 2025
Your guide to McAllen weather in September - trends and predictions
The forecast for the first days of September 2025 in McAllen predicts temperatures to be around 39 °F, close to the historical average.
In general, the average temperature in McAllen at the beginning of September is 33.9 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 34 °F by the end of September.
McAllen in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 203.3 mm.
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Temperatures
Rain 🌧️
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13
Dry days
17
Rainy days
0
Snow days
33°/25°
Temperatures
22 km/h
Avg max wind
68 %
Avg humidity
McAllen Weather September
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Temperatures trend during September in McAllen
See the weather trend as well as the moving average line
September weather in McAllen day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 39° /27° | 0 mm | 8 | |
| Sept. 2 |  Partly cloudy | 39° /28° | 0 mm | 8 | |
| Sept. 3 |  Moderate or heavy rain shower | 32° /26° | 8 mm | 7 | |
| Sept. 4 | Moderate or heavy rain shower | 30° /25° | 42.1 mm | 7 | |
| Sept. 5 | Moderate or heavy rain shower | 33° /25° | 17.4 mm | 7 | |
| Sept. 6 |  Patchy rain possible | 32° /26° | 0.2 mm | 7 | |
| Sept. 7 | Sunny | 32° /25° | 0 mm | 8 | |
| Sept. 8 |  Cloudy | 31° /23° | 0 mm | 7 | |
| Sept. 9 | Moderate or heavy rain shower | 30° /23° | 13.1 mm | 7 | |
| Sept. 10 | Moderate or heavy rain shower | 28° /23° | 9.8 mm | 6 | |
| Sept. 11 | Partly cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 12 | Partly cloudy | 35° /26° | 0 mm | 9 | |
| Sept. 13 | Partly cloudy | 35° /26° | 0 mm | 9 | |
| Sept. 14 | Cloudy | 36° /27° | 0 mm | 8 | |
| Sept. 15 | Moderate or heavy rain shower | 32° /26° | 40.8 mm | 7 | |
| Sept. 16 | Moderate or heavy rain shower | 32° /25° | 7.3 mm | 7 | |
| Sept. 17 | Moderate or heavy rain shower | 33° /25° | 5 mm | 7 | |
| Sept. 18 | Patchy rain possible | 34° /25° | 1.7 mm | 7 | |
| Sept. 19 | Moderate rain at times | 34° /26° | 1.3 mm | 7 | |
| Sept. 20 | Moderate rain at times | 33° /27° | 0.8 mm | 7 | |
| Sept. 21 | Moderate rain at times | 33° /26° | 0.9 mm | 7 | |
| Sept. 22 | Moderate or heavy rain shower | 32° /26° | 30.2 mm | 7 | |
| Sept. 23 | Moderate or heavy rain shower | 32° /25° | 13.4 mm | 7 | |
| Sept. 24 | Patchy rain possible | 34° /25° | 0.2 mm | 7 | |
| Sept. 25 | Moderate rain at times | 32° /24° | 0.9 mm | 7 | |
| Sept. 26 | Cloudy | 31° /24° | 0.2 mm | 7 | |
| Sept. 27 | Partly cloudy | 34° /22° | 0 mm | 8 | |
| Sept. 28 | Partly cloudy | 36° /22° | 0 mm | 9 | |
| Sept. 29 | Partly cloudy | 34° /23° | 0 mm | 8 | |
| Sept. 30 |  Mist | 37° /24° | 0 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for McAllen 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 McAllen forecast closer to your planned date for the most up-to-date weather information.
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McAllen in September - FAQ
What are the expected maximum and minimum temperatures in McAllen during September?
During September, expect a variety of temperatures with highs around 33° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in McAllen during September?
Significant rainfall exceeding 203.3 mm is expected in McAllen during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in McAllen during September?
The average wind speed in McAllen during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in McAllen
Explore the daily rainfall trends and prepare for McAllens September weather 💧
UV exposure in McAllen during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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