Decker Lake Weather Forecast

    • 37
    • 54

    Becoming Sunny

    • 44
    • 62

    Partly Sunny

    • 45
    • 63

    Mostly Cloudy

    • 47
    • 63

    Chance Rain Showers

    • 52
    • 70

    Chance Rain Showers

    • 59
    • 80

    Chance Rain Showers

Today 19 May Le Sueur

Decreasing Clouds. Chance of Sprinkles in the afternoon. Highs in the mid 50s. Northwest Winds 15 to 20 Mph.

Tonight 19 May Le Sueur

Mostly clear. Chance of Sprinkles in the evening. Lows in the upper 30s. Northwest Winds 5 to 15 Mph decreasing to 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

    56.9 °F

  • Highest 15 May, 2026

    89.1 °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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