Decker Lake Weather Forecast

    • 36
    • 63

    Decreasing Clouds

    • 34
    • 60

    Mostly Sunny

    • 50
    • 66

    Rain Showers Likely

    • 46
    • 76

    Mostly Sunny

    • 45
    • 69

    Partly Sunny

    • 53
    • 75

    Chance Rain Showers

Today 9 May Le Sueur

Cooler, sunny. Highs in the lower 60s. Northwest Winds 15 to 20 Mph.

Tonight 9 May Le Sueur

Colder. Mostly clear. Lows in the upper 30s. Northwest Winds 5 to 15 Mph shifting to the north up to 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Decker Lake Temperature Statistics

May Temperature

Mankato, Mankato Regional Airport (10.6 miles)

  • Lowest 6 May, 2026

    30 °F

  • Average May

    49.9 °F

  • Highest 3 May, 2026

    69.1 °F

Climate (2021–Present)

Mankato, Mankato Regional Airport (10.6 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.2 °F
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