Johnstown Rainfall Forecast

  • 5%
  • No Rain
  • No Rain
  • 5%
  • 20%
  • 15%
  • 20%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

Johnstown Rainfall Statistics

August Rainfall

Janesville-Rock County (13 miles)

  • Total Rainfall August

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  • Daily Average August

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  • Wettest Day 1 August, 2025

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  • Wet Days August

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Climate (2010–Present)

Janesville-Rock County (13 miles)

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  • Annual Average 2020–2024

    12.5in

  • Monthly Average 2020–2025

    1.1in

  • Daily Average 2020–2025

    0.04in

  • Wettest Day 22 June, 2024

    2.2in
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