Lake John Weather Forecast

    • 54
    • 83

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

    • 59
    • 83

    Chance Thunderstorms

    • 52
    • 73

    Chance Rain Showers

    • 51
    • 68

    Slight Chance Rain Showers

    • 53
    • 67

    Mostly Cloudy

    • 53
    • 69

    Mostly Cloudy

Today 15 Sep Northern Oconto County

Sunny. Temperatures in the lower 80s. South wind 5 to 10 Mph.

Tonight 15 Sep Northern Oconto County

Mostly clear. Patchy fog after midnight. Lows in the middle 50s. Light and variable wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake John Temperature Statistics

September Temperature

Langlade County Airport (32.3 miles)

  • Lowest 4 September, 2025

    35.8 °F

  • Average September

    55.3 °F

  • Highest 13 September, 2025

    77.7 °F

Climate (2020–Present)

Langlade County Airport (32.3 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    42.7 °F

  • Average High 2020–2025

    52 °F
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