Monson Lake Weather Forecast

    • 55
    • 87

    Chance Thunderstorms

    • 49
    • 70

    Chance Rain Showers

    • 48
    • 64

    Mostly Cloudy

    • 49
    • 64

    Rain Showers

    • 46
    • 65

    Partly Sunny

    • 49
    • 65

    Chance Rain Showers

    • 50
    • 67

    Partly Sunny

Today 11 Sep Swift

Breezy. Partly sunny. A 20 percent chance of Thunderstorms late in the afternoon. Near steady temperature in the mid 80s. South Winds 15 to 25 Mph.

Tonight 11 Sep Swift

Mostly clear. A 30 percent chance of Thunderstorms late in the evening. Some Thunderstorms may be severe with damaging Winds and large hail. Lows in the mid 50s. Northwest Winds 15 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monson Lake Temperature Statistics

September Temperature

Willmar Municipal Airport - John L. Rice Field (16.2 miles)

  • Lowest 1 September, 2026

    55.4 °F

  • Average September

    72.3 °F

  • Highest 3 September, 2026

    89.6 °F

Climate (2021–2026)

Willmar Municipal Airport - John L. Rice Field (16.2 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    55.9 °F
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