Lannon Lake Weather Forecast

    • 66
    • 86

    Rain Showers

    • 61
    • 78

    Chance Rain Showers

    • 62
    • 82

    Partly Sunny

    • 65
    • 86

    Mostly Sunny

    • 69
    • 90

    Mostly Sunny

    • 72
    • 95

    Mostly Sunny

Today 7 Jul Big Stone

Partly sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.

Tonight 7 Jul Big Stone

Thunderstorms likely. Showers after midnight. Humid with Lows in the mid 60s. East Winds 10 to 15 Mph. Chance of rain near 100 percent.

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Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 3 July, 2026

    60.8 °F

  • Average July

    74.1 °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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