Average temperatures, rainfall and packing tips for Dallas, United States in September
September in Dallas is typically hot, with average daytime highs around 31°C and nights near 21°C. Temperature-wise it sits mid-range for Dallas (the 4th warmest month).
Expect some rain: around 65 mm falls in Dallas during September on average.
If your dates are flexible, the most comfortable months in Dallas are usually February, March, April, May, October and November.
← Dallas weather tomorrow (live)
In September, Dallas averages a daytime high of about 31°C and a night-time low of around 21°C, based on recent historical data.
Expect some rain: around 65 mm falls in Dallas during September on average.
September is a workable time to visit Dallas, with hot days - just pack accordingly. If your dates are flexible, the most comfortable months in Dallas are usually February, March, April, May, October and November.