Dallas weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: March – April, October – November
What is the weather like in Dallas in September?
In September, Dallas is hot: daytime highs average 31 °C, and even at night it stays warm at around 22 °C. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 56 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Dallas.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 46 | 65 | 85 |
| Day | 35° | 31° | 26° |
| Night | 26° | 22° | 16° |
| Sun | 9 h | 8 h | 6 h |
| Rain days | 5 | 6 | 7 |
More details for September
- Daylight
- 12 h 25 min07:10 – 19:35
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 15 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 36 %on averageAll months
- Hot days
- 20 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC−5America/Chicago
How the score comes together
- Temperatureweight 50 %46 %
- Sunshineweight 20 %75 %
- Few rainy daysweight 30 %89 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
Dallas in September: quick answers
Is Dallas hot in September?
Yes. In September, Dallas is hot: daytime highs average 31 °C and nights stay around 22 °C. On about 20 days the thermometer climbs to 30 °C or more.
Does it rain much in Dallas in September?
Rain falls on about 6 days, adding up to 56 mm.
Dallas month by month
The whole year in DallasAll destinations: USAWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences