Waterfall Glen County Forest Preserve Weather Forecast

    • 57
    • 75

    Becoming Sunny

    • 60
    • 78

    Partly Sunny

    • 62
    • 80

    Partly Sunny

    • 70
    • 83

    Partly Sunny

    • 71
    • 91

    Partly Sunny

    • 69
    • 88

    Slight Chance Thunderstorms

Today 22 Jul DuPage

Partly cloudy. Temperatures in the mid 70s. Northeast Winds around 10 Mph.

Tonight 22 Jul DuPage

Mostly clear. Lows in the upper 50s. East Winds 5 to 10 Mph, becoming west after midnight.

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Waterfall Glen County Forest Preserve Temperature Statistics

July Temperature

Lewis University Airport (8.7 miles)

  • Lowest 20 July, 2026

    62.6 °F

  • Average July

    78.3 °F

  • Highest 2 July, 2026

    93.7 °F

Climate (2021–2026)

Lewis University Airport (8.7 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    62 °F
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