Lannon Lake Weather Forecast

    • 55
    • 78

    Decreasing Clouds

    • 59
    • 79

    Partly Sunny

    • 59
    • 83

    Chance Rain Showers

    • 56
    • 81

    Mostly Sunny

    • 56
    • 79

    Partly Sunny

    • 60
    • 79

    Chance Rain Showers

Today 18 Aug Big Stone

Partly sunny. Near steady temperature in the upper 70s. Northwest Winds 10 to 15 Mph.

Tonight 18 Aug Big Stone

Mostly clear. Lows in the mid 50s. North Winds 5 to 10 Mph this Evening, becoming light and variable.

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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

    69.7 °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

    54.4 °F
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