Lannon Lake Weather Forecast

    • 23
    • 34

    Mostly Cloudy

    • 22
    • 29

    Mostly Cloudy

    • 24
    • 38

    Partly Sunny

    • 21
    • 35

    Mostly Cloudy

    • 14
    • 33

    Mostly Cloudy

    • 8
    • 20

    Mostly Cloudy

Today 5 Jan Big Stone

Mostly cloudy. Areas of fog and freezing fog in the Morning, then patchy fog in the afternoon. Highs in the mid 30s. Southeast Winds around 5 Mph.

Tonight 5 Jan Big Stone

Mostly cloudy. Patchy fog. Lows in the lower 20s. East Winds around 5 Mph.

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Lannon Lake Temperature Statistics

January Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 1 January, 2026

    -2.2 °F

  • Average January

    7.5 °F

  • Highest 1 January, 2026

    12.2 °F

Climate (2021–Present)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    35 °F

  • Average 2021–2026

    44.8 °F

  • Average High 2021–2026

    54.6 °F
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