Darien Weather Forecast

    • 49
    • 74

    Increasing Clouds

    • 53
    • 76

    Mostly Sunny

    • 61
    • 78

    Partly Sunny

    • 60
    • 81

    Chance Thunderstorms

    • 57
    • 79

    Mostly Sunny

    • 57
    • 78

    Partly Sunny

Today 23 Aug Walworth

Sunny in the morning then becoming partly sunny. Highs in the mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 23 Aug Walworth

Mostly clear. Lows around 50. Northwest Winds up to 5 Mph through around midnight becoming calm.

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Darien Temperature Statistics

August Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    68.9 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (16.8 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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