Naperville Weather Forecast

    • 62
    • 78

    Chance Rain Showers

    • 65
    • 68

    Rain Showers

    • 58
    • 72

    Rain Showers

    • 50
    • 65

    Slight Chance Rain Showers

    • 50
    • 65

    Partly Sunny

    • 47
    • 66

    Mostly Sunny

Today 29 Sep DuPage

Mostly cloudy. Near steady temperature in the mid 70s. South Winds 5 to 10 Mph.

Tonight 29 Sep DuPage

Mostly cloudy. A chance of Showers late. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Naperville Temperature Statistics

September Temperature

Chicago / West Chicago, Dupage Airport (9.3 miles)

  • Lowest 27 September, 2026

    45 °F

  • Average September

    69.2 °F

  • Highest 1 September, 2026

    93 °F

Climate (2021–2026)

Chicago / West Chicago, Dupage Airport (9.3 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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