Lannon Lake Weather Forecast

    • 45
    • 68

    Mostly Sunny

    • 40
    • 69

    Mostly Sunny

    • 43
    • 62

    Mostly Sunny

    • 48
    • 67

    Mostly Sunny

    • 46
    • 70

    Mostly Sunny

    • 53
    • 70

    Partly Sunny

    • 57
    • 73

    Chance Rain Showers

Today 17 Oct Big Stone

Partly sunny. A slight chance of Showers in the Morning, then a chance of Showers in the afternoon. Highs in the upper 60s. Chance of rain 40 percent.

Tonight 17 Oct Big Stone

Clear this Evening, then becoming partly cloudy. Not as cool with Lows in the mid 40s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

October Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 2 October, 2026

    33.8 °F

  • Average October

    55.5 °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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