Union Weather Forecast

    • 34
    • 52

    Chance Rain

    • 22
    • 41

    Chance Rain

    • 31
    • 36

    Slight Chance Rain/Snow

    • 27
    • 51

    Mostly Cloudy

    • 16
    • 33

    Mostly Cloudy

    • 19
    • 27

    Chance Snow

Today 30 Jan Rock

Partly sunny. Highs in the mid 50s. Southwest Winds 5 to 15 Mph.

Tonight 30 Jan Rock

Not as cool. Mostly cloudy. A 50 percent chance of light rain in the late evening and overnight. Lows in the mid 30s. South Winds up to 5 Mph shifting to the northeast after midnight.

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  • Temperature Real-Time

Union Temperature Statistics

January Temperature

Janesville-Rock County (19.3 miles)

  • Lowest 21 January, 2025

    -13 °F

  • Average January

    17.1 °F

  • Highest 17 January, 2025

    53.6 °F

Climate (2020–Present)

Janesville-Rock County (19.3 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.2 °F
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