Romeoville Weather Forecast

    • 42
    • 67

    Increasing Clouds

    • 39
    • 63

    Mostly Cloudy

    • 51
    • 66

    Partly Sunny

    • 32
    • 66

    Mostly Cloudy

    • 33
    • 47

    Partly Sunny

    • 37
    • 54

    Mostly Cloudy

    • 44
    • 55

    Mostly Cloudy

Today 19 Mar Northern Will

Mostly sunny. Temperatures in the lower 60s. Southeast Winds around 5 Mph.

Tonight 19 Mar Northern Will

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 40s. East Winds 5 to 10 Mph, becoming south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Romeoville Temperature Statistics

March Temperature

Lewis University Airport (3.1 miles)

  • Lowest 16 March, 2026

    19.4 °F

  • Average March

    42.1 °F

  • Highest 6 March, 2026

    73.7 °F

Climate (2021–Present)

Lewis University Airport (3.1 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    61.8 °F
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