Darien Weather Forecast

    • 26
    • 28

    Patchy Freezing Fog

    • 31
    • 38

    Chance Snow

    • 29
    • 41

    Chance Rain

    • 34
    • 44

    Partly Sunny

    • 31
    • 46

    Chance Rain

    • 26
    • 40

    Chance Rain

    • 16
    • 32

    Slight Chance Snow

Today 4 Jan Walworth

Cloudy with a 20 percent chance of light freezing rain. South Winds 5 to 10 Mph.

Tonight 4 Jan Walworth

Not as cold. Mostly cloudy with a 30 percent chance of light freezing rain through around Midnight, then mostly clear after midnight. Near steady temperature in the upper 20s. South Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Darien Temperature Statistics

January Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 1 January, 2026

    8.6 °F

  • Average January

    16.3 °F

  • Highest 2 January, 2026

    21.2 °F

Climate (2021–Present)

Janesville-Rock County (16.8 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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