January in Gary averages a daily high of 0.1°C with nights around -7.9°C. Expect roughly 13.2 wet days totalling 65.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Gary is May–September.
Based on INDIANA DUNES NATIONAL PARK, IN US (21.9km), 1995–2024. 27 years of January data.