Lannon Lake Weather Forecast

    • 57
    • 81

    Slight Chance Thunderstorms

    • 52
    • 78

    Mostly Sunny

    • 60
    • 79

    Chance Rain Showers

    • 63
    • 79

    Chance Thunderstorms

    • 60
    • 84

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 59
    • 81

    Chance Rain Showers

Today 21 Aug Big Stone

Partly sunny. Near steady temperature in the upper 70s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 21 Aug Big Stone

Mostly clear. A slight chance of Thunderstorms this evening. Lows in the upper 50s. Northwest Winds around 5 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 8 August, 2026

    50 °F

  • Average August

    69.4 °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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