Dallas County
September
Weather in Dallas County for September 2025
Your guide to Dallas County weather in September - trends and predictions
In general, the average temperature in Dallas County at the beginning of September is 35.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 34 °F by the end of September.
Dallas County sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
37°/24°
Temperatures
20 km/h
Avg max wind
46 %
Avg humidity
Dallas County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  35° | 2  36° | 3  33° | 4  33° | 5 36° | 6 39° | 7 38° |
| 8 38° | 9 36° | 10 35° | 11  31° | 12  32° | 13  33° | 14 33° |
| 15 33° | 16 33° | 17 36° | 18 36° | 19 37° | 20  38° | 21 35° |
| 22 36° | 23 34° | 24 36° | 25 30° | 26 33° | 27 34° | 28 35° |
| 29 35° | 30 35° |
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Temperatures trend during September in Dallas County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Partly cloudy | 35° /25° | 1.1 mm | 8 | |
| Sept. 2 | Cloudy | 36° /24° | 0.6 mm | 8 | |
| Sept. 3 | Thundery outbreaks possible | 33° /23° | 4 mm | 8 | |
| Sept. 4 | Sunny | 33° /23° | 1.8 mm | 8 | |
| Sept. 5 | Partly cloudy | 36° /23° | 0.5 mm | 9 | |
| Sept. 6 | Partly cloudy | 39° /25° | 0.2 mm | 10 | |
| Sept. 7 | Sunny | 38° /26° | 0 mm | 9 | |
| Sept. 8 | Sunny | 38° /25° | 0.2 mm | 10 | |
| Sept. 9 | Thundery outbreaks possible | 36° /22° | 0 mm | 9 | |
| Sept. 10 | Partly cloudy | 35° /22° | 0 mm | 9 | |
| Sept. 11 | Light rain shower | 31° /23° | 1.8 mm | 7 | |
| Sept. 12 | Heavy rain | 32° /22° | 33.9 mm | 8 | |
| Sept. 13 | Overcast | 33° /23° | 0 mm | 8 | |
| Sept. 14 | Overcast | 33° /23° | 0.5 mm | 7 | |
| Sept. 15 | Cloudy | 33° /22° | 1 mm | 8 | |
| Sept. 16 | Partly cloudy | 33° /23° | 0 mm | 8 | |
| Sept. 17 | Sunny | 36° /22° | 0 mm | 9 | |
| Sept. 18 | Partly cloudy | 36° /24° | 0 mm | 9 | |
| Sept. 19 | Cloudy | 37° /25° | 0 mm | 8 | |
| Sept. 20 | Heavy rain at times | 38° /24° | 0.8 mm | 9 | |
| Sept. 21 | Thundery outbreaks possible | 35° /26° | 0.2 mm | 9 | |
| Sept. 22 | Thundery outbreaks possible | 36° /23° | 1.1 mm | 9 | |
| Sept. 23 | Thundery outbreaks possible | 34° /24° | 6.9 mm | 8 | |
| Sept. 24 | Patchy rain possible | 36° /25° | 1.3 mm | 8 | |
| Sept. 25 | Thundery outbreaks possible | 30° /23° | 1 mm | 7 | |
| Sept. 26 | Partly cloudy | 33° /21° | 0 mm | 8 | |
| Sept. 27 | Cloudy | 34° /21° | 0 mm | 8 | |
| Sept. 28 | Partly cloudy | 35° /23° | 0 mm | 9 | |
| Sept. 29 | Sunny | 35° /23° | 0 mm | 8 | |
| Sept. 30 | Sunny | 35° /22° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Dallas County 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 Dallas County forecast closer to your planned date for the most up-to-date weather information.
Dallas County in September - FAQ
What are the expected maximum and minimum temperatures in Dallas County during September?
With daytime temperatures soaring above 37° and not dropping much below 24° at night, September in Dallas County is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Dallas County during September?
Moderate rainfall is anticipated in Dallas County during September, with a total of 82.5 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Dallas County during September?
The average wind speed in Dallas County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
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