Lannon Lake Weather Forecast

    • 46
    • 66

    Decreasing Clouds

    • 52
    • 81

    Mostly Sunny

    • 58
    • 90

    Mostly Sunny

    • 58
    • 92

    Slight Chance Thunderstorms

    • 56
    • 85

    Slight Chance Thunderstorms

    • 55
    • 82

    Partly Sunny

Today 23 May Big Stone

Mostly cloudy this Morning, then becoming partly sunny. Warmer with Highs in the upper 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 23 May Big Stone

Mostly clear. Lows in the mid 40s. 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

    53.4 °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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