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Climate almanac

Jerseyville

Illinois, United States · 39.12°, -90.33°

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What is the weather like in Jerseyville in September?

In September, Jerseyville is typically 82°F (28°C) during the day and 61°F (16°C) at night. The month brings about 2.9 in (74 mm) of precipitation in total.

  • Average high82°F (28°C)
  • Average low61°F (16°C)
  • Precipitation2.9 in (74 mm)
  • Clear or mostly clear days16
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)