Lannon Lake Weather Forecast

    • 44
    • 69

    Mostly Cloudy

    • 44
    • 56

    Rain Showers

    • 45
    • 67

    Partly Sunny

    • 51
    • 79

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 57
    • 87

    Partly Sunny

    • 56
    • 84

    Partly Sunny

Today 21 May Big Stone

Partly sunny. Near steady temperature in the mid 60s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 21 May Big Stone

Mostly cloudy this Evening, then becoming partly cloudy. Lows in the mid 40s. Southeast Winds 15 to 20 Mph with Gusts up to 30 Mph.

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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

    53.4 °F

  • Highest 14 May, 2026

    80.6 °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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