Romeoville Weather Forecast

    • 48
    • 67

    Decreasing Clouds

    • 46
    • 72

    Partly Sunny

    • 42
    • 63

    Mostly Sunny

    • 42
    • 62

    Partly Sunny

    • 46
    • 64

    Rain Showers Likely

    • 47
    • 68

    Partly Sunny

Today 8 May Northern Will

Mostly cloudy. Highs in the upper 60s. South Winds 5 to 10 Mph.

Tonight 8 May Northern Will

Partly cloudy. Lows in the upper 40s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Romeoville Temperature Statistics

May Temperature

Lewis University Airport (3.1 miles)

  • Lowest 2 May, 2026

    30.7 °F
  • Average May

    51.6 °F
  • Highest 4 May, 2026

    79.6 °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

    61.9 °F
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