Lannon Lake Weather Forecast

    • 50
    • 82

    Decreasing Clouds

    • 47
    • 81

    Mostly Sunny

    • 47
    • 77

    Thunderstorms

    • 46
    • 73

    Thunderstorms

    • 41
    • 63

    Rain Showers Likely

    • 36
    • 54

    Breezy

    • 40
    • 61

    Mostly Cloudy

Today 14 May Big Stone

Partly sunny. Patchy blowing dust. Windy. Near steady temperature in the mid 70s. South Winds 20 to 30 Mph with Gusts up to 40 Mph.

Tonight 14 May Big Stone

Partly cloudy with a slight chance of Thunderstorms this Evening, then mostly clear after midnight. Lows in the upper 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to around 10 Mph with Gusts up to 20 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

May Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 6 May, 2026

    28.4 °F

  • Average May

    50.6 °F

  • Highest 11 May, 2026

    71.6 °F

Climate (2021–Present)

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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