Wheaton Weather Forecast

    • 60
    • 71

    Rain Showers

    • 62
    • 74

    Rain Showers

    • 54
    • 67

    Rain Showers Likely

    • 52
    • 62

    Chance Rain Showers

    • 52
    • 61

    Slight Chance Rain Showers

    • 51
    • 64

    Mostly Cloudy

Today 18 Sep DuPage

Mostly cloudy. Isolated Showers in the late morning and afternoon. Highs in the lower 70s. East Winds around 10 Mph. Chance of precipitation 20 percent.

Tonight 18 Sep DuPage

Mostly cloudy. A chance of Showers and Thunderstorms after midnight. Showers with Thunderstorms likely late. Lows around 60. East Winds around 10 Mph. Chance of precipitation 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Wheaton Temperature Statistics

September Temperature

Chicago / West Chicago, Dupage Airport (7.5 miles)

  • Lowest 14 September, 2026

    46.7 °F

  • Average September

    73.3 °F

  • Highest 1 September, 2026

    93 °F

Climate (2021–2026)

Chicago / West Chicago, Dupage Airport (7.5 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    61.6 °F
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