Darien Weather Forecast

    • 28
    • 40

    Decreasing Clouds

    • 28
    • 48

    Mostly Sunny

    • 32
    • 51

    Partly Sunny

    • 30
    • 51

    Partly Sunny

    • 38
    • 52

    Mostly Cloudy

    • 42
    • 54

    Mostly Cloudy

Today 12 Feb Walworth

Mostly cloudy in the morning then clearing. Highs around 40. Southeast Winds up to 5 Mph.

Tonight 12 Feb Walworth

Partly cloudy after midnight then becoming mostly cloudy. Near steady temperature in the lower 20s. Calm Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Darien Temperature Statistics

February Temperature

Janesville-Rock County (16.8 miles)

  • Lowest 4 February, 2026

    -4 °F

  • Average February

    19.8 °F

  • Highest 6 February, 2026

    37.4 °F

Climate (2021–Present)

Janesville-Rock County (16.8 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    60.2 °F
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