May in Johnson City averages a daily high of 25°C with nights around 11.8°C. Expect roughly 13 wet days totalling 113.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Johnson City is April–May.
Based on ELIZABETHTON, TN US (10.4km), 1995–2024. 30 years of May data.