May in Rowlett averages a daily high of 28.2°C with nights around 17°C. Expect roughly 8.4 wet days totalling 115.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Rowlett is March–April.
Based on LAVON DAM, TX US (16.4km), 1995–2024. 20 years of May data.