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The weather in Dallas in September is hot. The average temperatures are between 22°C and 31°C.
You can expect about 3 to 8 days of rain in Dallas during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Dallas in September 2025.
If you’re planning to visit Dallas in the near future, we highly recommend that you review the 14 day weather forecast for Dallas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 13° / 5° | 4 | 27 | 1 | 90 mm | Ok | Dallas in January |
| February | 14° / 6° | 5 | 21 | 2 | 99 mm | Ok | Dallas in February |
| March | 19° / 10° | 6 | 25 | 0 | 137 mm | Good | Dallas in March |
| April | 23° / 13° | 6 | 24 | 0 | 123 mm | Perfect | Dallas in April |
| May | 28° / 18° | 8 | 23 | 0 | 209 mm | Good | Dallas in May |
| June | 32° / 23° | 7 | 23 | 0 | 154 mm | Ok | Dallas in June |
| July | 35° / 24° | 7 | 24 | 0 | 120 mm | Bad | Dallas in July |
| August | 35° / 25° | 6 | 25 | 0 | 134 mm | Ok | Dallas in August |
| September | 31° / 22° | 7 | 23 | 0 | 178 mm | Ok | Dallas in September |
| October | 25° / 16° | 6 | 25 | 0 | 188 mm | Perfect | Dallas in October |
| November | 19° / 10° | 4 | 25 | 0 | 115 mm | Good | Dallas in November |
| December | 14° / 7° | 5 | 26 | 0 | 125 mm | Good | Dallas in December |