Climate almanac

Chillicothe

Illinois, US · 40.92°, -89.49°

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What is the climate like in Chillicothe?

The best time to visit Chillicothe is typically August – September, with trip comfort peaking in September (7.4/10). Chillicothe is warmest in July, when daily highs average 85°F (29°C), and coolest in January, when lows fall to about 20°F (-6°C). The wettest month is typically May and the driest is November; the year sees roughly 40 in of precipitation.

  • Best time to visitAugust – September — comfort peaks in September (7.4/10)
  • Warmest monthJuly — average high 85°F (29°C)
  • Coolest monthJanuary — average low 20°F (-6°C)
  • Wettest monthMay (4.9 in)
  • Driest monthNovember (2.1 in)
  • Annual precipitation40 in