Coal City Weather Forecast

    • 66
    • 77

    Chance Rain Showers

    • 50
    • 80

    Chance Thunderstorms

    • 44
    • 64

    Partly Sunny

    • 48
    • 68

    Partly Sunny

    • 53
    • 69

    Rain Showers Likely

    • 56
    • 76

    Chance Rain Showers

    • 58
    • 80

    Slight Chance Thunderstorms

Today 18 May Grundy

Showers and a chance of Thunderstorms late in the Morning, then a slight chance of Showers and Thunderstorms in the afternoon. Breezy. Highs in the mid 80s. Temperature falling into the upper 70s in the afternoon. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation near 100 percent.

Tonight 18 May Grundy

Cloudy. A chance of Showers and a slight chance of Thunderstorms after midnight. Lows in the mid 60s. South Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Coal City Temperature Statistics

May Temperature

Joliet Regional Airport (16.8 miles)

  • Lowest 2 May, 2026

    29.8 °F

  • Average May

    56.8 °F

  • Highest 16 May, 2026

    82.8 °F

Climate (2021–Present)

Joliet Regional Airport (16.8 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    63.4 °F
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