Decker Lake Weather Forecast

    • 52
    • 64

    Chance Rain Showers

    • 54
    • 62

    Rain Showers Likely

    • 56
    • 66

    Rain Showers Likely

    • 57
    • 64

    Chance Rain Showers

    • 57
    • 70

    Mostly Cloudy

    • 57
    • 71

    Chance Rain Showers

Today 23 Sep Le Sueur

Mostly sunny. Highs in the mid 60s. Southeast Winds 5 to 10 Mph.

Tonight 23 Sep Le Sueur

Mostly cloudy. Lows in the lower 50s. Southeast Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Decker Lake Temperature Statistics

September Temperature

Mankato, Mankato Regional Airport (10.6 miles)

  • Lowest 13 September, 2026

    50 °F

  • Average September

    67.7 °F

  • Highest 4 September, 2026

    90 °F

Climate (2021–2026)

Mankato, Mankato Regional Airport (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    39.4 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.1 °F
Get WillyWeather+ to remove ads