Lannon Lake Weather Forecast

    • 62
    • 84

    Rain Showers Likely

    • 59
    • 79

    Slight Chance Thunderstorms

    • 62
    • 77

    Chance Thunderstorms

    • 57
    • 77

    Mostly Cloudy

    • 55
    • 74

    Mostly Sunny

    • 59
    • 78

    Chance Rain Showers

Today 12 Aug Big Stone

Partly sunny. Highs in the lower 80s. Light and variable Winds, becoming east around 5 Mph.

Tonight 12 Aug Big Stone

Mostly cloudy with a 50 percent chance of Thunderstorms. Humid with Lows in the lower 60s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

August Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 8 August, 2026

    50 °F

  • Average August

    68.7 °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

    54.5 °F
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