Johnstown Center Weather Forecast

    • 44
    • 68

    Mostly Sunny

    • 43
    • 78

    Chance Thunderstorms

    • 36
    • 56

    Slight Chance Rain Showers

    • 35
    • 54

    Mostly Cloudy

    • 37
    • 56

    Slight Chance Thunderstorms

    • 39
    • 59

    Partly Sunny

    • 44
    • 66

    Partly Sunny

Today 3 May Rock

Sunny. Southwest Winds 15 to 20 Mph.

Tonight 3 May Rock

Clear. Lows in the mid 40s. Southwest Winds up to 10 Mph.

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Johnstown Center Temperature Statistics

May Temperature

Janesville-Rock County (11.2 miles)

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  • Average May

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Climate (2021–Present)

Janesville-Rock County (11.2 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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