Johnstown Weather Forecast

    • 25
    • 47

    Sunny

    • 37
    • 55

    Rain

    • 34
    • 56

    Mostly Cloudy

    • 37
    • 48

    Rain

    • 35
    • 49

    Rain

    • 30
    • 48

    Chance Rain

    • 29
    • 48

    Partly Sunny

Today 28 Mar Rock

Sunny. West Winds 5 to 15 Mph.

Tonight 28 Mar Rock

Clear. Lows in the mid 20s. Northwest Winds 5 to 10 Mph shifting to the northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

March Temperature

Janesville-Rock County (13 miles)

  • Lowest 18 March, 2024

    24.8 °F
  • Average March

    41.2 °F
  • Highest 3 March, 2024

    75.2 °F

Climate (2019–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2019–2024

    40.7 °F
  • Average 2019–2024

    48.8 °F
  • Average High 2019–2024

    60 °F
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