Lannon Lake Weather Forecast

    • 64
    • 80

    Chance Rain Showers

    • 59
    • 81

    Mostly Cloudy

    • 55
    • 77

    Mostly Sunny

    • 60
    • 80

    Chance Rain Showers

    • 56
    • 77

    Rain Showers Likely

    • 54
    • 74

    Slight Chance Thunderstorms

Today 14 Aug Big Stone

Partly sunny. A slight chance of Showers this afternoon. Highs around 80. East Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 14 Aug Big Stone

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Humid with Lows in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 30 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

    69.3 °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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