Darien Weather Forecast

    • 70
    • 87

    Chance Thunderstorms

    • 69
    • 90

    Chance Thunderstorms

    • 67
    • 84

    Chance Thunderstorms

    • 68
    • 86

    Chance Thunderstorms

    • 63
    • 82

    Chance Thunderstorms

    • 60
    • 77

    Partly Sunny

Today 15 Aug Walworth

Mostly sunny. Highs in the upper 80s. South Winds up to 10 Mph.

Tonight 15 Aug Walworth

Partly cloudy with a 30 percent chance of light Showers and Thunderstorms. Lows around 70. South Winds up to 5 Mph.

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Darien Temperature Statistics

August Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 2 August, 2025

    50 °F

  • Average August

    69.6 °F

  • Highest 8 August, 2025

    89.6 °F

Climate (2020–Present)

Janesville-Rock County (16.8 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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