April in Lowell averages a daily high of 15.1°C with nights around 1.6°C. Expect roughly 11.5 wet days totalling 102.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lowell is May–June.
Based on LOWELL, MA US (4km), 1995–2024. 28 years of April data.