Climate almanac
Manhattan
Illinois, United States · 41.42°, -87.99°
What is the climate like in Manhattan?
The best time to visit Manhattan is typically August – September, with trip comfort peaking in September (7.1/10). Manhattan is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 21°F (-6°C). The wettest month is typically May and the driest is November; the year sees roughly 43 in (1089 mm) of precipitation.
- Best time to visitAugust – September — comfort peaks in September (7.1/10)
- Warmest monthJuly — average high 84°F (29°C)
- Coolest monthJanuary — average low 21°F (-6°C)
- Wettest monthMay (5.1 in (129 mm))
- Driest monthNovember (2.3 in (59 mm))
- Annual precipitation43 in (1089 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromJoliet, 16 km away (1893-2026)