May in Jacksonville averages a daily high of 27°C with nights around 15.8°C. Expect roughly 10.3 wet days totalling 111.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Jacksonville is March–May.
Based on NEW RIVER MCAF, NC US (5.2km), 1995–2024. 27 years of May data.