Lannon Lake Weather Forecast

    • 25
    • 45

    Gradual Clearing

    • 29
    • 44

    Partly Sunny

    • 32
    • 55

    Partly Sunny

    • 29
    • 49

    Partly Sunny

    • 33
    • 48

    Mostly Cloudy

    • 20
    • 45

    Mostly Cloudy

Today 20 Nov Big Stone

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the upper 40s. Northwest Winds 5 to 10 Mph.

Tonight 20 Nov Big Stone

Cloudy. Near steady temperature in the lower 40s. West Winds around 5 Mph.

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Lannon Lake Temperature Statistics

November Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 7 November, 2025

    23 °F

  • Average November

    39.5 °F

  • Highest 14 November, 2025

    66.2 °F

Climate (2020–Present)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    35.1 °F

  • Average 2020–2025

    45 °F

  • Average High 2020–2025

    54.7 °F
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