Lannon Lake Weather Forecast

    • 63
    • 86

    Rain Showers

    • 59
    • 81

    Slight Chance Thunderstorms

    • 62
    • 83

    Mostly Sunny

    • 66
    • 83

    Mostly Sunny

    • 59
    • 84

    Breezy

    • 55
    • 74

    Slight Chance Rain Showers

Today 30 Jul Big Stone

Patchy smoke this morning. Partly sunny this Morning, then mostly cloudy with Showers with a chance of Thunderstorms this afternoon. Locally heavy rainfall possible this afternoon. Highs in the mid 80s. South Winds 10 to 15 Mph. Chance of rain 90 percent.

Tonight 30 Jul Big Stone

Showers likely with a chance of Thunderstorms. Patchy smoke after midnight. Humid with Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

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Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 22 July, 2026

    50 °F

  • Average July

    75 °F

  • Highest 26 July, 2026

    93.2 °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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