Lake Jefferson Weather Forecast

    • -7
    • 9

    Cold

    • -7
    • 7

    Cold

    • -6
    • 7

    Cold

    • 8
    • 16

    Chance Snow

    • 13
    • 26

    Chance Snow

    • 9
    • 24

    Mostly Cloudy

Today 28 Jan Le Sueur

Sunny. Highs around 9. Northwest Winds 5 to 10 Mph.

Tonight 28 Jan Le Sueur

Mostly clear. Lows around 7 below. Northwest Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Jefferson Temperature Statistics

January Temperature

Mankato, Mankato Regional Airport (7.5 miles)

  • Lowest 23 January, 2026

    -20 °F

  • Average January

    16.4 °F

  • Highest 13 January, 2026

    44.1 °F

Climate (2021–Present)

Mankato, Mankato Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    57 °F
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