August in Hammond averages a daily high of 27.9°C with nights around 17.1°C. Expect roughly 8.9 wet days totalling 101.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Hammond is August–September.
Based on PARK FOREST WATER, IL US (17.9km), 1995–2024. 29 years of August data.