May in Middletown averages a daily high of 22.4°C with nights around 10.6°C. Expect roughly 12.3 wet days totalling 101.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Middletown is May–June.
Based on FREEHOLD MARLBORO, NJ US (14.5km), 1995–2024. 26 years of May data.