Darien Weather Forecast

    • 35
    • 38

    Drizzle

    • 25
    • 42

    Mostly Cloudy

    • 34
    • 41

    Chance Rain

    • 38
    • 42

    Rain Likely

    • 33
    • 46

    Cloudy

    • 20
    • 46

    Mostly Cloudy

    • 9
    • 27

    Mostly Cloudy

Today 22 Dec Walworth

Cloudy. Widespread drizzle. South Winds 5 to 10 Mph. Chance of precipitation 60 percent.

Tonight 22 Dec Walworth

Not as cool. Cloudy. Chance of drizzle until early morning. Near steady temperature in the upper 30s. Southwest Winds 5 to 10 Mph. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Darien Temperature Statistics

December Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 14 December, 2025

    -7.6 °F

  • Average December

    19.4 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Janesville-Rock County (16.8 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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