Old School Forest Preserve Weather Forecast

    • 58
    • 70

    Increasing Clouds

    • 59
    • 72

    Rain Showers

    • 52
    • 67

    Rain Showers Likely

    • 51
    • 63

    Chance Rain Showers

    • 51
    • 62

    Mostly Cloudy

    • 50
    • 64

    Mostly Cloudy

Today 18 Sep Lake

Mostly cloudy. Isolated Showers in the afternoon. Highs around 70. East Winds 10 to 15 Mph. Chance of precipitation 20 percent.

Tonight 18 Sep Lake

Cloudy. A slight chance of Showers and Thunderstorms in the Evening, then Showers with Thunderstorms likely after midnight. Locally heavy rainfall possible late. Lows in the upper 50s. East Winds 10 to 15 Mph. Chance of precipitation 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Old School Forest Preserve Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

  • Lowest 14 September, 2026

    50.6 °F

  • Average September

    73.6 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.5 °F
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