Lannon Lake Weather Forecast

    • 58
    • 80

    Mostly Cloudy

    • 59
    • 79

    Chance Thunderstorms

    • 61
    • 80

    Slight Chance Thunderstorms

    • 55
    • 78

    Mostly Cloudy

    • 55
    • 73

    Partly Sunny

    • 57
    • 73

    Slight Chance Thunderstorms

Today 9 Aug Big Stone

Partly sunny. Highs in the lower 80s. North Winds around 5 Mph.

Tonight 9 Aug Big Stone

Mostly cloudy. Lows in the upper 50s. North Winds around 5 Mph, becoming east around 5 Mph after midnight.

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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

    54.5 °F
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