Barnum Lake Weather Forecast

    • 40
    • 64

    Mostly Cloudy

    • 38
    • 62

    Partly Sunny

    • 39
    • 64

    Mostly Sunny

    • 44
    • 65

    Partly Sunny

    • 48
    • 64

    Chance Rain Showers

    • 51
    • 70

    Mostly Cloudy

Today 20 Sep North Cass

Mostly sunny. Highs in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 20 Sep North Cass

Mostly cloudy. Cooler with Lows around 40. East Winds around 5 Mph.

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Barnum Lake Temperature Statistics

September Temperature

Longville, Longville Municipal Airport (5.6 miles)

  • Lowest 14 September, 2026

    35.4 °F

  • Average September

    62.5 °F

  • Highest 3 September, 2026

    84 °F

Climate (2021–2026)

Longville, Longville Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    31.3 °F

  • Average 2021–2026

    41.6 °F

  • Average High 2021–2026

    51.2 °F
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