Rockdale Weather Forecast

    • 63
    • 81

    Chance Thunderstorms

    • 59
    • 73

    Chance Rain Showers

    • 54
    • 74

    Slight Chance Rain Showers

    • 56
    • 79

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

Today 23 Sep Northern Will

Partly cloudy late in the Morning, then becoming mostly cloudy. Scattered Showers with isolated Thunderstorms late in the Morning, then isolated Showers late in the morning. A chance of Showers and Thunderstorms in the afternoon. Highs around 80. West Winds 5 to 10 Mph. Chance of precipitation 40 percent.

Tonight 23 Sep Northern Will

Cloudy. A chance of Thunderstorms in the evening. A chance of Showers. A slight chance of Thunderstorms after midnight. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rockdale Temperature Statistics

September Temperature

Joliet Regional Airport (3.1 miles)

  • Lowest 7 September, 2025

    40.1 °F

  • Average September

    67.1 °F

  • Highest 18 September, 2025

    89.6 °F

Climate (2020–Present)

Joliet Regional Airport (3.1 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    53.5 °F

  • Average High 2020–2025

    63 °F
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