Decker Lake Weather Forecast

    • 62
    • 84

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 53
    • 81

    Sunny

    • 63
    • 82

    Chance Thunderstorms

    • 67
    • 83

    Chance Rain Showers

    • 64
    • 86

    Chance Thunderstorms

    • 60
    • 83

    Partly Sunny

Today 25 Aug Le Sueur

Sunny. Highs in the mid 80s. Southwest Winds 10 to 15 Mph.

Tonight 25 Aug Le Sueur

Clear. Lows in the lower 60s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Decker Lake Temperature Statistics

August Temperature

Mankato, Mankato Regional Airport (10.6 miles)

  • Lowest 23 August, 2026

    53.1 °F

  • Average August

    70.6 °F

  • Highest 11 August, 2026

    84 °F

Climate (2021–2026)

Mankato, Mankato Regional Airport (10.6 miles)

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  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.1 °F
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