June in Harlingen averages a daily high of 34.7°C with nights around 24°C. Expect roughly 5.6 wet days totalling 48.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Harlingen is November–March.
Based on HARLINGEN, TX US (2.7km), 1995–2024. 25 years of June data.