June in Lewisville averages a daily high of 33.4°C with nights around 21.7°C. Expect roughly 7 wet days totalling 91.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lewisville is March–April.
Based on GRAPEVINE DAM, TX US (12.1km), 1995–2024. 24 years of June data.