South Chicago Heights Weather Forecast

    • 45
    • 59

    Mostly Cloudy

    • 49
    • 64

    Mostly Cloudy

    • 55
    • 66

    Rain Showers Likely

    • 55
    • 73

    Mostly Cloudy

    • 56
    • 76

    Partly Sunny

    • 58
    • 78

    Slight Chance Thunderstorms

Today 20 May Southern Cook

Mostly cloudy. Highs in the upper 50s. Northeast Winds 10 to 15 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 20 May Southern Cook

Partly cloudy. Lows in the mid 40s. Northeast Winds 10 to 15 Mph.

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South Chicago Heights Temperature Statistics

May Temperature

Lansing Municipal Airport (6.8 miles)

  • Lowest 2 May, 2026

    28.6 °F

  • Average May

    55.2 °F

  • Highest 17 May, 2026

    85.5 °F

Climate (2021–Present)

Lansing Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    60.5 °F
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