Prairie Grove Weather Forecast

    • 62
    • 82

    Partly Sunny

    • 60
    • 78

    Partly Sunny

    • 62
    • 80

    Partly Sunny

    • 72
    • 85

    Chance Rain Showers

    • 61
    • 86

    Partly Sunny

    • 59
    • 79

    Partly Sunny

Today 5 Sep McHenry

Mostly cloudy early in the Afternoon, then becoming partly cloudy. Highs in the lower 80s. Northeast Winds around 10 Mph.

Tonight 5 Sep McHenry

Partly cloudy. Lows in the lower 60s. Northeast Winds 5 to 10 Mph.

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Prairie Grove Temperature Statistics

September Temperature

Chicago / Wheeling, Pal-Waukee Airport (21.1 miles)

  • Lowest 1 September, 2026

    72.6 °F

  • Average September

    83.6 °F

  • Highest 2 September, 2026

    96.7 °F

Climate (2021–2026)

Chicago / Wheeling, Pal-Waukee Airport (21.1 miles)

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  • Average Low 2021–2026

    44 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    61.6 °F
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