Island Lake Weather Forecast

    • 59
    • 80

    Slight Chance Thunderstorms

    • 56
    • 81

    Slight Chance Rain Showers

    • 55
    • 75

    Chance Rain Showers

    • 54
    • 68

    Chance Rain Showers

    • 52
    • 66

    Chance Rain Showers

    • 54
    • 67

    Chance Rain Showers

    • 54
    • 71

    Mostly Cloudy

Today 15 Sep Mahnomen

Mostly sunny with a chance of Showers and Thunderstorms. Highs 75 to 80. South Winds around 15 Mph with Gusts to around 30 Mph. Chance of rain 30 percent.

Tonight 15 Sep Mahnomen

Mostly clear. Lows 55 to 60. South Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Lake Temperature Statistics

September Temperature

Fosston, Fosston Municipal Airport (11.2 miles)

  • Lowest 7 September, 2025

    32 °F

  • Average September

    56.5 °F

  • Highest 12 September, 2025

    77 °F

Climate (2020–Present)

Fosston, Fosston Municipal Airport (11.2 miles)

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

  • Average Low 2020–2025

    30.2 °F

  • Average 2020–2025

    40 °F

  • Average High 2020–2025

    49.4 °F
Get WillyWeather+ to remove ads