Lannon Lake Weather Forecast

    • 34
    • 53

    Decreasing Clouds

    • 31
    • 43

    Slight Chance Rain/Snow

    • 34
    • 45

    Mostly Cloudy

    • 39
    • 58

    Partly Sunny

    • 35
    • 59

    Mostly Sunny

    • 36
    • 57

    Partly Sunny

Today 30 Oct Big Stone

Mostly cloudy with a slight chance of rain and freezing rain in the Morning, then mostly sunny in the afternoon. Highs in the lower 50s. South Winds around 5 Mph, becoming west with Gusts up to 20 Mph in the afternoon. Chance of precipitation 20 percent.

Tonight 30 Oct Big Stone

Mostly cloudy. Near steady temperature in the lower 30s. Southwest Winds around 5 Mph.

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Lannon Lake Temperature Statistics

October Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 23 October, 2025

    28.4 °F

  • Average October

    53.7 °F

  • Highest 3 October, 2025

    91.4 °F

Climate (2020–Present)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    35.2 °F

  • Average 2020–2025

    45 °F

  • Average High 2020–2025

    54.8 °F
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