Dallas, Texas Weather in September

September heat

Dallas is still hot in September, though it's a step down from August. Days reach about 33°C, and evenings stay warm around 21°C. Humidity can make afternoons feel sticky, so outdoor sightseeing is more comfortable later in the day.

Rain falls on about seven days, often in showers or storms. Keep outdoor plans flexible, and avoid exposed walks during the hottest hours. The Dallas Arts District's museums work well when the heat builds; save Klyde Warren Park or the Katy Trail for a cooler evening.

Fair Park and holiday weekends

The State Fair of Texas usually opens in late September at Fair Park. You'll find Big Tex, rides and classic fair food, including fried treats. Expect bigger crowds around the fairgrounds once it starts. Labor Day also brings a long weekend early in the month.

Families who enjoy rides and fair food may love the State Fair, but quieter plans suit you better before it opens.

Crowds and local tips

With school back in session, September is generally calmer than spring, one of Dallas's popular travel seasons. Prices can be easier than during spring, though fair weekends may bring more visitors and higher rates near Fair Park. October is cooler, but also brings more rain.

For the State Fair, take DART's Green Line to Fair Park station. It drops you close to the gates and avoids dealing with event traffic and parking. If you're visiting before the fair, the Sixth Floor Museum and Dallas Museum of Art offer air-conditioned breaks from the heat.