Johnsburg Weather Forecast

    • 61
    • 83

    Increasing Clouds

    • 57
    • 77

    Partly Sunny

    • 58
    • 71

    Mostly Cloudy

    • 60
    • 74

    Chance Thunderstorms

    • 61
    • 75

    Chance Rain Showers

    • 58
    • 76

    Chance Rain Showers

Today 17 Sep Fond Du Lac

Sunny. Highs in the mid 80s. Southwest Winds up to 5 Mph.

Tonight 17 Sep Fond Du Lac

Partly cloudy. A 20 percent chance of light Showers and Thunderstorms in the late evening and early morning. Lows in the lower 60s. South Winds up to 5 Mph shifting to the northeast after midnight.

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Johnsburg Temperature Statistics

September Temperature

Fond Du Lac County Airport (12.4 miles)

  • Lowest 4 September, 2025

    41 °F

  • Average September

    60 °F

  • Highest 14 September, 2025

    80.1 °F

Climate (2020–Present)

Fond Du Lac County Airport (12.4 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    58.4 °F
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