Copan Lake Weather Forecast

    • 60
    • 90

    Sunny

    • 61
    • 89

    Sunny

    • 58
    • 90

    Sunny

    • 64
    • 88

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

Today 7 Oct Washington

Sunny. Highs in the upper 80s. Southwest Winds around 5 Mph.

Tonight 7 Oct Washington

Clear. Lows in the upper 50s. South Winds around 5 Mph, becoming north after midnight.

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Copan Lake Temperature Statistics

October Temperature

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

  • Lowest 5 October, 2026

    51.1 °F

  • Average October

    69 °F

  • Highest 4 October, 2026

    82 °F

Climate (2021–2026)

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    61.2 °F

  • Average High 2021–2026

    74 °F
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