Darien Weather Forecast

    • 58
    • 79

    Decreasing Clouds

    • 66
    • 84

    Mostly Cloudy

    • 72
    • 90

    Chance Thunderstorms

    • 67
    • 91

    Slight Chance Thunderstorms

    • 62
    • 87

    Mostly Sunny

    • 62
    • 86

    Slight Chance Thunderstorms

Today 24 Jul Walworth

Partly sunny. Highs around 80. South Winds up to 10 Mph.

Tonight 24 Jul Walworth

Mostly clear. Lows in the upper 50s. South Winds up to 5 Mph.

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  • Temperature Real-Time

Darien Temperature Statistics

July Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 22 July, 2026

    50 °F

  • Average July

    74.6 °F

  • Highest 14 July, 2026

    95 °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

    60.4 °F
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