Romeoville Weather Forecast

    • 42
    • 69

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

    • 56
    • 77

    Mostly Cloudy

    • 60
    • 82

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 62
    • 84

    Partly Sunny

Today 7 Sep Northern Will

Mostly sunny. Highs in the upper 60s. Northwest Winds 5 to 10 Mph.

Tonight 7 Sep Northern Will

Mostly clear. Lows in the lower 40s. North Winds around 5 Mph in the Evening, becoming light and variable.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Romeoville Temperature Statistics

September Temperature

Lewis University Airport (3.1 miles)

  • Lowest 4 September, 2025

    48.2 °F

  • Average September

    61.7 °F

  • Highest 2 September, 2025

    78.8 °F

Climate (2020–Present)

Lewis University Airport (3.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    61.7 °F
Get WillyWeather+ to remove ads