Lannon Lake Weather Forecast

    • 53
    • 73

    Increasing Clouds

    • 59
    • 72

    Rain Showers

    • 53
    • 71

    Rain Showers

    • 51
    • 73

    Partly Sunny

    • 46
    • 66

    Mostly Sunny

    • 48
    • 65

    Partly Sunny

Today 27 Sep Big Stone

Cloudy late this Morning, then becoming partly sunny. Patchy dense fog late this morning. Highs in the lower 70s. North Winds around 5 Mph.

Tonight 27 Sep Big Stone

Partly cloudy in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 50s. East Winds around 5 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

    64.5 °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

    54.4 °F
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