Lewisville (TX)
September
Weather in Lewisville, Texas for September 2025
Your guide to Lewisville weather in September - trends and predictions
So far, September 2025 in Lewisville is slightly warmer than the historical average by 0.6 °F.
The forecast for the upcoming days in Lewisville predicts a temperature of 35.1 °F, which is slightly above the historical average.
In general, the average temperature in Lewisville at the beginning of September is 31.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 34.4 °F by the end of September.
Lewisville experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 41.5 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
32°/22°
Temperatures
19 km/h
Avg max wind
51 %
Avg humidity
Lewisville Weather September
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Temperatures trend during September in Lewisville
See the weather trend as well as the moving average line
September weather in Lewisville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 32° /23° | 4.1 mm | 7 | |
| Sept. 2 |  Light drizzle | 32° /24° | 7.1 mm | 7 | |
| Sept. 3 | Light rain shower | 29° /20° | 2.1 mm | 7 | |
| Sept. 4 | Patchy rain possible | 32° /21° | 1.1 mm | 7 | |
| Sept. 5 | Light rain shower | 34° /22° | 0.7 mm | 8 | |
| Sept. 6 |  Partly cloudy | 31° /20° | 11.2 mm | 8 | |
| Sept. 7 |  Sunny | 29° /21° | 0 mm | 7 | |
| Sept. 8 | Sunny | 31° /18° | 0 mm | 8 | |
| Sept. 9 | Sunny | 32° /18° | 0 mm | 8 | |
| Sept. 10 | Sunny | 34° /20° | 0 mm | 9 | |
| Sept. 11 | Light rain shower | 33° /22° | 0.6 mm | 8 | |
| Sept. 12 | Partly cloudy | 35° /23° | 0.1 mm | 9 | |
| Sept. 13 | Sunny | 36° /24° | 0 mm | 9 | |
| Sept. 14 | Patchy rain possible | 36° /24° | 0.3 mm | 8 | |
| Sept. 15 | Patchy rain possible | 35° /24° | 2 mm | 8 | |
| Sept. 16 | Sunny | 37° /24° | 0 mm | 1.8 | |
| Sept. 17 | Sunny | 38° /25° | 0 mm | 1.8 | |
| Sept. 18 | Sunny | 35° /25° | 0 mm | 1.8 | |
| Sept. 19 | Patchy rain possible | 35° /26° | 0.3 mm | 1.7 | |
| Sept. 20 | Sunny | 35° /26° | 0 mm | 0 | |
| Sept. 21 | Sunny | 36° /26° | 0 mm | 8 | |
| Sept. 22 | Partly cloudy | 32° /25° | 0 mm | 7 | |
| Sept. 23 |  Cloudy | 34° /26° | 0 mm | 6 | |
| Sept. 24 | Sunny | 35° /26° | 0 mm | 8 | |
| Sept. 25 | Sunny | 36° /27° | 0 mm | 8 | |
| Sept. 26 | Sunny | 36° /27° | 0 mm | 8 | |
| Sept. 27 | Partly cloudy | 36° /27° | 0.1 mm | 8 | |
| Sept. 28 | Patchy rain possible | 31° /26° | 1.5 mm | 6 | |
| Sept. 29 |  Overcast | 33° /17° | 0 mm | 7 | |
| Sept. 30 | Sunny | 34° /17° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Lewisville 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 Lewisville forecast closer to your planned date for the most up-to-date weather information.
Change Month
Lewisville in September - FAQ
What are the expected maximum and minimum temperatures in Lewisville during September?
During September, expect a variety of temperatures with highs around 32° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Lewisville during September?
In September, Lewisville can expect light to moderate rainfall, totaling 41.5 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Lewisville during September?
The average wind speed in Lewisville during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Lewisville
Explore the daily rainfall trends and prepare for Lewisvilles September weather 💧
UV exposure in Lewisville during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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