Lannon Lake Weather Forecast

    • 65
    • 83

    Slight Chance Thunderstorms

    • 65
    • 84

    Slight Chance Thunderstorms

    • 61
    • 82

    Partly Sunny

    • 60
    • 81

    Slight Chance Thunderstorms

    • 63
    • 83

    Slight Chance Thunderstorms

    • 64
    • 84

    Slight Chance Thunderstorms

Today 29 Aug Big Stone

Partly sunny. Near steady temperature in the upper 70s. East Winds 5 to 10 Mph.

Tonight 29 Aug Big Stone

Mostly cloudy. A slight chance of Thunderstorms after midnight. Humid with Lows in the mid 60s. East Winds 5 to 10 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 23 August, 2026

    46.4 °F

  • Average August

    69.1 °F

  • Highest 20 August, 2026

    86 °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

    54.5 °F
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