September in Methuen averages a daily high of 24.1°C with nights around 12.7°C. Expect roughly 8.6 wet days totalling 93mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Methuen is May–June.
Based on LAWRENCE, MA US (3.6km), 1995–2024. 30 years of September data.