Lannon Lake Weather Forecast

    • 57
    • 66

    Rain Showers

    • 54
    • 71

    Partly Sunny

    • 58
    • 71

    Rain Showers

    • 52
    • 68

    Chance Rain Showers

    • 52
    • 70

    Partly Sunny

    • 48
    • 66

    Partly Sunny

Today 26 Sep Big Stone

Cloudy. Showers, mainly this morning. Patchy fog. Highs in the mid 60s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 26 Sep Big Stone

Mostly cloudy. Patchy fog. Lows in the upper 50s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

September Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 16 September, 2026

    41 °F

  • Average September

    64.6 °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

    54.4 °F
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