Lannon Lake Weather Forecast

    • 63
    • 81

    Chance Thunderstorms

    • 61
    • 79

    Chance Thunderstorms

    • 59
    • 77

    Partly Sunny

    • 60
    • 74

    Chance Thunderstorms

    • 58
    • 72

    Chance Rain Showers

    • 57
    • 73

    Partly Sunny

Today 11 Aug Big Stone

Partly sunny. A chance of Thunderstorms this morning. Areas of fog this morning. Highs in the lower 80s. Northeast Winds around 5 Mph. Chance of rain 40 percent.

Tonight 11 Aug Big Stone

Mostly cloudy. A chance of Thunderstorms after midnight. Humid with Lows in the lower 60s. East Winds around 5 Mph. Chance of rain 50 percent.

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Lannon Lake Temperature Statistics

August Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 8 August, 2026

    50 °F

  • Average August

    69 °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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