Lake Jefferson Weather Forecast

    • 61
    • 78

    Sunny

    • 59
    • 81

    Chance Rain Showers

    • 51
    • 72

    Partly Sunny

    • 55
    • 65

    Rain Showers

    • 50
    • 69

    Chance Rain Showers

    • 48
    • 62

    Partly Sunny

Today 10 Sep Le Sueur

Sunny. Areas of fog early in the Morning, then patchy fog late in the morning. Highs in the upper 70s. South Winds up to 5 Mph.

Tonight 10 Sep Le Sueur

Clear. Lows in the lower 60s. South Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Jefferson Temperature Statistics

September Temperature

Mankato, Mankato Regional Airport (7.5 miles)

  • Lowest 1 September, 2026

    62.1 °F

  • Average September

    74.5 °F

  • Highest 4 September, 2026

    90 °F

Climate (2021–2026)

Mankato, Mankato Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.2 °F
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