May in Haverhill averages a daily high of 20.1°C with nights around 7.3°C. Expect roughly 12.7 wet days totalling 97.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Haverhill is May–June.
Based on HAVERHILL, MA US (2.3km), 1995–2024. 30 years of May data.