Lannon Lake Weather Forecast

    • 72
    • 91

    Patchy Smoke

    • 67
    • 94

    Mostly Sunny

    • 66
    • 88

    Partly Sunny

    • 70
    • 91

    Chance Rain Showers

    • 64
    • 90

    Mostly Sunny

    • 61
    • 83

    Partly Sunny

Today 16 Jul Big Stone

Mostly sunny. Patchy smoke. Hot with Highs in the lower 90s. South Winds 5 to 10 Mph.

Tonight 16 Jul Big Stone

Mostly clear. Humid with Lows in the lower 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 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

    75.2 °F

  • Highest 14 July, 2026

    91.4 °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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