Six Flags - Great America Weather Forecast

    • 61
    • 75

    Mostly Cloudy

    • 47
    • 68

    Rain Showers

    • 46
    • 65

    Chance Rain Showers

    • 38
    • 53

    Chance Rain Showers

    • 41
    • 50

    Partly Sunny

    • 43
    • 58

    Partly Sunny

    • 43
    • 50

    Chance Rain Showers

Today 21 Oct Lake

Partly sunny. Highs in the mid 70s. South Winds 10 to 20 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 21 Oct Lake

Partly cloudy. Chance of Showers and a slight chance of Thunderstorms after midnight. Lows in the lower 60s. South Winds 10 to 15 Mph. Chance of precipitation 30 percent.

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Six Flags - Great America Temperature Statistics

October Temperature

Chicago/Waukegan Regional Airport (5 miles)

  • Lowest 16 October, 2017

    42.1 °F
  • Average October

    60.7 °F
  • Highest 2 October, 2017

    80.1 °F

Climate (2010–Present)

Chicago/Waukegan Regional Airport (5 miles)

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  • Average Low 2010–Present

    39.8 °F
  • Average 2010–Present

    48.5 °F
  • Average High 2010–Present

    56.4 °F
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