Westmont Weather Forecast

    • 63
    • 72

    Thunderstorms Likely

    • 65
    • 77

    Rain Showers

    • 57
    • 69

    Rain Showers Likely

    • 54
    • 64

    Chance Rain Showers

    • 54
    • 63

    Slight Chance Rain Showers

    • 54
    • 65

    Mostly Cloudy

    • 55
    • 68

    Mostly Cloudy

Today 18 Sep DuPage

Mostly cloudy in the Morning, then becoming partly cloudy. Highs around 70.

Tonight 18 Sep DuPage

Mostly cloudy. A slight chance of Showers early in the evening. A chance of Showers and Thunderstorms after midnight. Lows in the lower 60s. East Winds around 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Westmont Temperature Statistics

September Temperature

Chicago, Chicago Midway Airport (11.2 miles)

  • Lowest 14 September, 2026

    53.1 °F

  • Average September

    75.9 °F

  • Highest 2 September, 2026

    96.1 °F

Climate (2021–2026)

Chicago, Chicago Midway Airport (11.2 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    61.9 °F
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