Lannon Lake Weather Forecast

    • 60
    • 76

    Decreasing Clouds

    • 62
    • 81

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 69
    • 90

    Mostly Sunny

    • 71
    • 91

    Mostly Sunny

    • 70
    • 92

    Mostly Sunny

    • 67
    • 90

    Mostly Sunny

Today 8 Jul Big Stone

Mostly cloudy. Near steady temperature in the mid 70s. North Winds 5 to 10 Mph.

Tonight 8 Jul Big Stone

Mostly cloudy this Evening, then clearing. Lows around 60. North Winds 5 to 10 Mph.

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  • Temperature Real-Time

Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 3 July, 2026

    60.8 °F

  • Average July

    74.8 °F

  • Highest 4 July, 2026

    87.8 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.7 °F

  • Average 2021–2026

    44.5 °F

  • Average High 2021–2026

    54.4 °F
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