Decker Lake Weather Forecast

    • 46
    • 71

    Increasing Clouds

    • 37
    • 63

    Mostly Sunny

    • 35
    • 59

    Mostly Sunny

    • 48
    • 66

    Mostly Cloudy

    • 43
    • 69

    Slight Chance Rain Showers

    • 49
    • 71

    Partly Sunny

Today 8 May Le Sueur

Warmer. Mostly sunny. Highs in the lower 70s. West Winds 5 to 15 Mph.

Tonight 8 May Le Sueur

Partly cloudy. A 20 percent chance of rain Showers after midnight. Lows in the mid 40s. West Winds 5 to 10 Mph.

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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

    50 °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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