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Climate almanac

Oconomowoc

Wisconsin, United States · 43.11°, -88.50°

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What is the weather like in Oconomowoc in September?

In September, Oconomowoc is typically 75°F (24°C) during the day and 57°F (14°C) at night. The month brings about 3.5 in (89 mm) of precipitation in total.

  • Average high75°F (24°C)
  • Average low57°F (14°C)
  • Precipitation3.5 in (89 mm)
  • Clear or mostly clear days13
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)