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Climate almanac

Chillicothe

Illinois, United States · 40.92°, -89.49°

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What is the weather like in Chillicothe in August?

In August, Chillicothe is typically 83°F (28°C) during the day and 65°F (19°C) at night. The month brings about 3.1 in (80 mm) of precipitation in total.

  • Average high83°F (28°C)
  • Average low65°F (19°C)
  • Precipitation3.1 in (80 mm)
  • Clear or mostly clear days14
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)