March in Knoxville averages a daily high of 16.5°C with nights around 2.8°C. Expect roughly 11.7 wet days totalling 127.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Knoxville is April–May.
Based on KNOXVILLE EXPERIMENTAL STATION, TN US (7.7km), 1995–2024. 30 years of March data.