Lannon Lake Weather Forecast

    • 33
    • 57

    Mostly Sunny

    • 48
    • 70

    Partly Sunny

    • 40
    • 70

    Breezy

    • 46
    • 71

    Partly Sunny

    • 52
    • 81

    Breezy

    • 50
    • 81

    Partly Sunny

Today 10 May Big Stone

Widespread frost this morning. Mostly sunny. Highs in the upper 50s. North Winds 10 to 15 Mph.

Tonight 10 May Big Stone

Mostly clear. Widespread frost after midnight. Cold with Lows in the lower 30s. North Winds 10 to 15 Mph, becoming southeast around 5 Mph after midnight.

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Lannon Lake Temperature Statistics

May Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 6 May, 2026

    28.4 °F

  • Average May

    48 °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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