Lannon Lake Weather Forecast

    • -8
    • 2

    Cold

    • -13
    • -3

    Cold

    • 2
    • 17

    Partly Sunny

    • -1
    • 10

    Cold

    • -7
    • 11

    Partly Sunny

    • -5
    • 8

    Cold

Today 24 Jan Big Stone

Partly sunny. Not as cold with Highs around 3 above. South Winds 5 to 10 Mph.

Tonight 24 Jan Big Stone

Mostly cloudy. Cold with Lows around 11 below. Southeast Winds around 5 Mph. Wind chill Values as low as 20 below.

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Lannon Lake Temperature Statistics

January Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 22 January, 2026

    -18.4 °F

  • Average January

    17.6 °F

  • Highest 12 January, 2026

    44.6 °F

Climate (2021–Present)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.9 °F

  • Average 2021–2026

    44.8 °F

  • Average High 2021–2026

    54.5 °F
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