Decker Lake Weather Forecast
- 40
- 63
Chance Rain Showers
- 42
- 59
Chance Rain Showers
- 40
- 62
Chance Rain Showers
- 32
- 52
Mostly Sunny
- 38
- 59
Partly Sunny
- 37
- 60
Mostly Sunny
Today 18 Oct Le Sueur
Cooler. Mostly sunny until Afternoon, then mostly cloudy with a 40 percent chance of rain Showers late in the afternoon. Highs in the lower 60s. Southwest Winds 5 to 10 Mph shifting to the northwest 10 to 15 Mph in the afternoon.
Tonight 18 Oct Le Sueur
Cloudy with a 50 percent chance of rain Showers in the Evening, then mostly clear after midnight. Lows around 40. Northwest Winds 10 to 15 Mph.
Decker Lake Temperature Statistics
October Temperature
Mankato, Mankato Regional Airport (10.6 miles)
Lowest 8 October, 2025
36 °FAverage October
60.7 °FHighest 3 October, 2025
90 °F
Climate (2020–Present)
Mankato, Mankato Regional Airport (10.6 miles)
Average Low 2020–2025
39.3 °FAverage 2020–2025
48.2 °FAverage High 2020–2025
57 °F