Lannon Lake Weather Forecast

    • 36
    • 61

    Increasing Clouds

    • 41
    • 70

    Partly Sunny

    • 34
    • 59

    Partly Sunny

    • 33
    • 58

    Mostly Sunny

    • 44
    • 68

    Chance Rain Showers

    • 41
    • 70

    Partly Sunny

    • 47
    • 74

    Slight Chance Rain Showers

Today 7 May Big Stone

Mostly sunny and not as cool. Near steady temperature in the upper 50s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 7 May Big Stone

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the mid 30s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming south around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

May Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 1 May, 2026

    30.2 °F

  • Average May

    49.8 °F

  • Highest 2 May, 2026

    69.8 °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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