Johnstown Center Weather Forecast

    • 23
    • 28

    Mostly Cloudy

    • 10
    • 36

    Snow Showers

    • 10
    • 23

    Mostly Sunny

    • 20
    • 28

    Partly Sunny

    • 27
    • 38

    Partly Sunny

    • 33
    • 44

    Mostly Cloudy

Today 3 Dec Rock

Partly sunny. Highs in the upper 20s. Southwest Winds 5 to 15 Mph.

Tonight 3 Dec Rock

Mostly cloudy. Near steady temperature in the mid 20s. Southwest Winds 15 to 20 Mph.

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Johnstown Center Temperature Statistics

December Temperature

Janesville-Rock County (11.2 miles)

  • Lowest 1 December, 2024

    8.6 °F

  • Average December

    14.2 °F

  • Highest 1 December, 2024

    24.8 °F

Climate (2019–Present)

Janesville-Rock County (11.2 miles)

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  • Average Low 2019–2024

    40.8 °F

  • Average 2019–2024

    49 °F

  • Average High 2019–2024

    60.4 °F
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