Lemont Weather Forecast

    • 59
    • 79

    Mostly Cloudy

    • 60
    • 73

    Chance Rain Showers

    • 65
    • 80

    Chance Thunderstorms

    • 74
    • 88

    Partly Sunny

    • 76
    • 93

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

Today 25 Jun Southern Cook

Mostly sunny late in the Morning, then becoming partly cloudy. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.

Tonight 25 Jun Southern Cook

Mostly cloudy. Lows in the upper 50s. Northeast Winds around 5 Mph.

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Lemont Temperature Statistics

June Temperature

Lewis University Airport (6.8 miles)

  • Lowest 2 June, 2026

    45.6 °F

  • Average June

    69.4 °F

  • Highest 6 June, 2026

    90.6 °F

Climate (2021–2026)

Lewis University Airport (6.8 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.9 °F
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