October in Nashua averages a daily high of 17.2°C with nights around 4.2°C. Expect roughly 10.8 wet days totalling 128.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nashua is May–June.
Based on NASHUA 2 NNW, NH US (2.9km), 1995–2024. 30 years of October data.