Lannon Lake Weather Forecast

    • 64
    • 84

    Chance Thunderstorms

    • 66
    • 86

    Mostly Sunny

    • 68
    • 91

    Chance Thunderstorms

    • 67
    • 87

    Rain Showers Likely

    • 63
    • 84

    Rain Showers Likely

    • 62
    • 82

    Partly Sunny

Today 4 Jul Big Stone

Partly sunny. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the mid 80s. South Winds around 5 Mph, becoming northwest around 5 Mph this afternoon. Chance of rain 40 percent.

Tonight 4 Jul Big Stone

Mostly cloudy with a chance of Thunderstorms in the Evening, then partly cloudy after midnight. Humid with Lows in the mid 60s. East Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Real-Time

Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 1 July, 2026

    62.6 °F

  • Average July

    74.2 °F

  • Highest 2 July, 2026

    86 °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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