Decker Lake Weather Forecast

    • 46
    • 74

    Breezy

    • 47
    • 72

    Mostly Sunny

    • 54
    • 77

    Chance Rain Showers

    • 52
    • 84

    Mostly Sunny

    • 55
    • 81

    Chance Thunderstorms

    • 52
    • 80

    Rain Showers Likely

Today 12 May Le Sueur

Windy. Partly sunny early in the morning then clearing. Highs in the mid 70s. West Winds 10 to 20 Mph increasing to northwest 20 to 30 Mph in the afternoon.

Tonight 12 May Le Sueur

Breezy, Cooler, clear. Lows in the mid 40s. Northwest Winds 15 to 25 Mph with Gusts to around 40 Mph decreasing to 5 to 15 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

    51.3 °F

  • Highest 8 May, 2026

    72 °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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