Lemont Weather Forecast

    • 40
    • 61

    Mostly Sunny

    • 51
    • 75

    Chance Rain Showers

    • 43
    • 63

    Partly Sunny

    • 48
    • 68

    Partly Sunny

    • 57
    • 72

    Chance Rain Showers

    • 58
    • 77

    Chance Rain Showers

Today 11 May Southern Cook

Sunny. Highs in the upper 50s. Northeast Winds 10 to 15 Mph.

Tonight 11 May Southern Cook

Mostly clear. Lows around 40. East Winds 5 to 10 Mph, becoming southeast after midnight.

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Lemont Temperature Statistics

May Temperature

Lewis University Airport (6.8 miles)

  • Lowest 2 May, 2026

    30.7 °F

  • Average May

    50.6 °F

  • Highest 4 May, 2026

    79.6 °F

Climate (2021–Present)

Lewis University Airport (6.8 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    61.9 °F
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