Three Island Lake Weather Forecast

    • 41
    • 64

    Mostly Cloudy

    • 37
    • 62

    Mostly Sunny

    • 38
    • 64

    Mostly Sunny

    • 44
    • 66

    Chance Rain Showers

    • 48
    • 66

    Slight Chance Rain Showers

    • 52
    • 72

    Mostly Cloudy

Today 20 Sep South Beltrami

Partly sunny. Highs in the mid 60s. East Winds up to 10 Mph.

Tonight 20 Sep South Beltrami

Mostly cloudy. Lows 40 to 45. East Winds around 5 Mph in the evening becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Three Island Lake Temperature Statistics

September Temperature

Bemidji (9.3 miles)

  • Lowest 14 September, 2026

    34.2 °F

  • Average September

    61.7 °F

  • Highest 3 September, 2026

    83.5 °F

Climate (2021–2026)

Bemidji (9.3 miles)

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  • Average Low 2021–2026

    30.4 °F

  • Average 2021–2026

    41.1 °F

  • Average High 2021–2026

    50.8 °F
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