March in Waltham averages a daily high of 8.4°C with nights around -2.8°C. Expect roughly 10.3 wet days totalling 99.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Waltham is May–June.
Based on BEDFORD HANSCOM FIELD, MA US (11.3km), 1995–2024. 26 years of March data.