Lannon Lake Weather Forecast

    • 54
    • 73

    Rain Showers

    • 53
    • 64

    Rain Showers

    • 53
    • 68

    Mostly Cloudy

    • 53
    • 67

    Chance Rain Showers

    • 51
    • 66

    Slight Chance Rain Showers

    • 52
    • 68

    Mostly Cloudy

Today 17 Sep Big Stone

Mostly cloudy this Morning, then becoming partly sunny. Patchy fog this morning. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 17 Sep Big Stone

Mostly cloudy. Showers likely after midnight. Lows in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

September Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 14 September, 2026

    44.6 °F

  • Average September

    68.4 °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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