Lannon Lake Weather Forecast

    • 49
    • 64

    Rain Showers

    • 45
    • 70

    Mostly Sunny

    • 50
    • 66

    Chance Rain Showers

    • 53
    • 71

    Mostly Cloudy

    • 54
    • 69

    Chance Rain Showers

    • 50
    • 70

    Partly Sunny

Today 14 Sep Big Stone

A chance of Thunderstorms. Showers, breezy with Highs in the mid 60s. Southeast Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.

Tonight 14 Sep Big Stone

Mostly cloudy. Near steady temperature around 50. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

September Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 10 September, 2026

    46.4 °F

  • Average September

    71.5 °F

  • Highest 3 September, 2026

    89.6 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.5 °F
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