Symerton Weather Forecast

    • 70
    • 86

    Chance Thunderstorms

    • 72
    • 91

    Chance Thunderstorms

    • 67
    • 88

    Chance Thunderstorms

    • 63
    • 80

    Partly Sunny

    • 62
    • 82

    Mostly Sunny

    • 64
    • 86

    Mostly Sunny

Today 17 Aug Southern Will

Mostly cloudy through mid Afternoon, then becoming partly cloudy. A chance of Showers and Thunderstorms through mid Morning, then a slight chance of Showers and Thunderstorms late in the morning. Highs in the mid 80s. Northeast Winds 5 to 10 Mph. Chance of precipitation 40 percent.

Tonight 17 Aug Southern Will

Mostly clear early in the Evening, then becoming partly cloudy. Lows around 70. East Winds 5 to 10 Mph.

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Symerton Temperature Statistics

August Temperature

Joliet Regional Airport (14.3 miles)

  • Lowest 2 August, 2025

    55.6 °F

  • Average August

    76 °F

  • Highest 9 August, 2025

    91.4 °F

Climate (2020–Present)

Joliet Regional Airport (14.3 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    63 °F
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