Lannon Lake Weather Forecast

    • 54
    • 85

    Increasing Clouds

    • 57
    • 90

    Mostly Sunny

    • 58
    • 91

    Slight Chance Thunderstorms

    • 57
    • 89

    Partly Sunny

    • 58
    • 85

    Mostly Cloudy

    • 56
    • 82

    Slight Chance Thunderstorms

    • 54
    • 79

    Slight Chance Thunderstorms

Today 24 May Big Stone

Mostly sunny. Near steady temperature in the lower 80s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 24 May Big Stone

Partly cloudy this Evening, then clearing. Lows in the mid 50s. South Winds 5 to 10 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

    53.3 °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

    34.6 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
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