October in Lowell averages a daily high of 17.2°C with nights around 4.6°C. Expect roughly 10.9 wet days totalling 130.1mm. 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. 30 years of October data.