Lannon Lake Weather Forecast

    • 67
    • 88

    Mostly Sunny

    • 69
    • 91

    Thunderstorms Likely

    • 67
    • 87

    Rain Showers

    • 60
    • 80

    Chance Rain Showers

    • 61
    • 81

    Partly Sunny

    • 63
    • 83

    Mostly Sunny

    • 69
    • 86

    Mostly Sunny

Today 5 Jul Big Stone

Mostly sunny. Near steady temperature in the mid 80s. Southeast Winds around 5 Mph.

Tonight 5 Jul Big Stone

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 3 July, 2026

    60.8 °F

  • Average July

    74 °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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