Lannon Lake Weather Forecast

    • 62
    • 83

    Slight Chance Thunderstorms

    • 55
    • 77

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 60
    • 81

    Rain Showers Likely

    • 58
    • 76

    Partly Sunny

    • 59
    • 77

    Slight Chance Thunderstorms

Today 6 Aug Big Stone

Partly sunny. Highs in the mid 80s. South Winds around 10 Mph, increasing to 15 to 20 Mph this afternoon.

Tonight 6 Aug Big Stone

Partly cloudy. A slight chance of Thunderstorms after midnight. Lows in the lower 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

August Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 4 August, 2026

    55.4 °F

  • Average August

    70 °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

    34.7 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
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