Romeoville Weather Forecast

    • 58
    • 79

    Slight Chance Thunderstorms

    • 55
    • 75

    Partly Sunny

    • 58
    • 78

    Partly Sunny

    • 63
    • 79

    Slight Chance Thunderstorms

    • 65
    • 82

    Chance Thunderstorms

    • 62
    • 81

    Partly Sunny

Today 22 Aug Northern Will

Partly cloudy. A slight chance of Showers and Thunderstorms. Temperatures in the upper 70s. Northwest Winds 10 to 15 Mph. Chance of precipitation 20 percent.

Tonight 22 Aug Northern Will

Clear. Lows in the upper 50s. Northwest Winds 5 to 10 Mph.

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Romeoville Temperature Statistics

August Temperature

Lewis University Airport (3.1 miles)

  • Lowest 20 August, 2026

    62.6 °F

  • Average August

    74.1 °F

  • Highest 10 August, 2026

    89.7 °F

Climate (2021–2026)

Lewis University Airport (3.1 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    61.9 °F
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