Six Flags - Great America Weather Forecast

    • 41
    • 52

    Mostly Sunny

    • 54
    • 72

    Rain Showers

    • 31
    • 65

    Chance Rain Showers

    • 29
    • 43

    Partly Sunny

    • 44
    • 58

    Partly Sunny

    • 40
    • 66

    Chance Rain Showers

Today 13 Mar Lake

Mostly sunny. Highs in the upper 50s Inland, but only in the mid 40s near the lake. East Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.

Tonight 13 Mar Lake

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 40s. East Winds 5 to 10 Mph in the Evening, becoming southeast after midnight.

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Six Flags - Great America Temperature Statistics

March Temperature

Chicago/Waukegan Regional Airport (5 miles)

  • Lowest 2 March, 2025

    13.7 °F

  • Average March

    39 °F

  • Highest 10 March, 2025

    69.1 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (5 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.2 °F
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