Lannon Lake Weather Forecast

    • 42
    • 69

    Becoming Sunny

    • 56
    • 77

    Mostly Sunny

    • 59
    • 77

    Chance Rain

    • 41
    • 67

    Slight Chance Rain

    • 37
    • 52

    Chance Rain

    • 36
    • 50

    Mostly Cloudy

    • 40
    • 52

    Partly Sunny

Today 21 Oct Big Stone

Partly sunny. A slight chance of rain in the morning. Highs in the upper 50s. Chance of rain 20 percent.

Tonight 21 Oct Big Stone

Partly cloudy this Evening, then clearing. Lows in the lower 40s. North Winds 5 to 10 Mph, becoming northeast after midnight.

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  • Temperature Real-Time

Lannon Lake Temperature Statistics

October Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 19 October, 2026

    30.2 °F

  • Average October

    54.3 °F

  • Highest 10 October, 2026

    93.2 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
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