Coal City Weather Forecast

    • 46
    • 70

    Mostly Sunny

    • 45
    • 73

    Mostly Sunny

    • 42
    • 68

    Sunny

    • 49
    • 72

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 51
    • 76

    Mostly Sunny

Today 3 Oct Grundy

Sunny. Highs around 70. Southeast Winds 5 to 10 Mph.

Tonight 3 Oct Grundy

Mostly clear. Lows in the upper 40s. Southeast Winds around 5 Mph, becoming south after midnight.

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Coal City Temperature Statistics

October Temperature

Joliet Regional Airport (16.8 miles)

  • Lowest 1 October, 2026

    61.9 °F

  • Average October

    67.5 °F

  • Highest 1 October, 2026

    73.8 °F

Climate (2021–2026)

Joliet Regional Airport (16.8 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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