August in Dallas averages a daily high of 36.3°C with nights around 25.6°C. Expect roughly 4.8 wet days totalling 58.7mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Dallas is March–April.
Based on DALLAS FAA AIRPORT, TX US (6.7km), 1995–2024. 30 years of August data.