July in Johnson City averages a daily high of 29.8°C with nights around 18°C. Expect roughly 13.7 wet days totalling 146.5mm. 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. 29 years of July data.