Big Island Lake Weather Forecast

    • 35
    • 53

    Chance Rain Showers

    • 40
    • 54

    Rain Showers Likely

    • 40
    • 54

    Mostly Cloudy

    • 38
    • 57

    Partly Sunny

    • 42
    • 61

    Partly Sunny

    • 50
    • 66

    Slight Chance Thunderstorms

    • 51
    • 68

    Mostly Cloudy

Today 3 Sep North Itasca

Mostly cloudy with a 20 percent chance of Showers. Much cooler. Near steady temperature in the lower 50s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 3 Sep North Itasca

Mostly cloudy with a chance of Sprinkles. Patchy frost. Cooler with Lows in the mid 30s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Island Lake Temperature Statistics

September Temperature

Bigfork Municipal Airport (14.9 miles)

  • Lowest 1 September, 2025

    55.4 °F

  • Average September

    70.1 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Bigfork Municipal Airport (14.9 miles)

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  • Average Low 2020–2025

    30.8 °F

  • Average 2020–2025

    42.1 °F

  • Average High 2020–2025

    52.4 °F
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