Lannon Lake Weather Forecast

    • 61
    • 82

    Chance Thunderstorms

    • 60
    • 79

    Slight Chance Thunderstorms

    • 61
    • 79

    Chance Rain Showers

    • 59
    • 79

    Slight Chance Thunderstorms

    • 57
    • 77

    Partly Sunny

    • 55
    • 75

    Chance Rain Showers

Today 8 Aug Big Stone

Partly sunny. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 8 Aug Big Stone

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly cloudy with a chance of Thunderstorms after midnight. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 40 percent.

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Lannon Lake Temperature Statistics

August Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 5 August, 2026

    51.8 °F

  • Average August

    69.2 °F

  • Highest 3 August, 2026

    84.2 °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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