Heidecke Lake Weather Forecast

    • 50
    • 75

    Increasing Clouds

    • 60
    • 77

    Rain Showers

    • 59
    • 83

    Mostly Cloudy

    • 56
    • 76

    Partly Sunny

    • 62
    • 83

    Partly Sunny

    • 52
    • 75

    Mostly Cloudy

    • 56
    • 72

    Chance Rain Showers

Today 8 Oct Grundy

Partly cloudy with a 50 percent chance of Showers. Highs in the mid 70s.

Tonight 8 Oct Grundy

Clear in the Evening, then becoming partly cloudy. Isolated Showers late. Lows in the lower 50s. North Winds around 5 Mph in the Evening, becoming light and variable. Chance of precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Heidecke Lake Temperature Statistics

October Temperature

Joliet Regional Airport (13 miles)

  • Lowest 5 October, 2026

    42.1 °F

  • Average October

    60.8 °F

  • Highest 6 October, 2026

    75.9 °F

Climate (2021–2026)

Joliet Regional Airport (13 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.3 °F
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