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Climate almanac

Collinsville

Illinois, United States · 38.67°, -89.98°

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What is the weather like in Collinsville in October?

In October, Collinsville is typically 70°F (21°C) during the day and 50°F (10°C) at night. The month brings about 3.3 in (84 mm) of precipitation in total.

  • Average high70°F (21°C)
  • Average low50°F (10°C)
  • Precipitation3.3 in (84 mm)
  • Clear or mostly clear days14
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)