October in Hammond averages a daily high of 17.6°C with nights around 6.5°C. Expect roughly 11 wet days totalling 96mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hammond is August–September.
Based on PARK FOREST WATER, IL US (17.9km), 1995–2024. 30 years of October data.