Lannon Lake Weather Forecast

    • 72
    • 95

    Mostly Sunny

    • 70
    • 97

    Hot

    • 72
    • 96

    Mostly Sunny

    • 73
    • 96

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

Today 13 Jul Big Stone

Mostly sunny. Hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph, becoming south around 15 Mph this afternoon.

Tonight 13 Jul Big Stone

Mostly clear. Lows in the lower 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 9 July, 2026

    59 °F

  • Average July

    73.7 °F

  • Highest 11 July, 2026

    89.6 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.7 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
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