Lake Jefferson Weather Forecast

    • 4
    • 27

    Becoming Sunny

    • 24
    • 31

    Partly Sunny

    • 23
    • 38

    Mostly Cloudy

    • 22
    • 31

    Mostly Cloudy

    • 33
    • 40

    Mostly Cloudy

    • 25
    • 44

    Partly Sunny

Today 20 Dec Le Sueur

Breezy. Not as cold. Sunny. Highs in the upper 20s. Temperatures falling into the upper teens in the afternoon. Northwest Winds 15 to 25 Mph.

Tonight 20 Dec Le Sueur

Colder, clear. Lows around 2. Northwest Winds 5 to 15 Mph shifting to the west up to 5 Mph after midnight.

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Lake Jefferson Temperature Statistics

December Temperature

Mankato, Mankato Regional Airport (7.5 miles)

  • Lowest 4 December, 2025

    -9.9 °F

  • Average December

    15.9 °F

  • Highest 16 December, 2025

    46 °F

Climate (2020–Present)

Mankato, Mankato Regional Airport (7.5 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    48.2 °F

  • Average High 2020–2025

    57 °F
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