Copan Lake Weather Forecast

    • 70
    • 93

    Chance Rain Showers

    • 71
    • 96

    Partly Sunny

    • 72
    • 97

    Hot

    • 69
    • 95

    Partly Sunny

    • 69
    • 95

    Partly Sunny

    • 72
    • 96

    Slight Chance Thunderstorms

Today 23 Aug Washington

Partly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the mid 90s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 23 Aug Washington

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the lower 70s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Copan Lake Temperature Statistics

August Temperature

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

  • Lowest 18 August, 2026

    60.7 °F

  • Average August

    85.6 °F

  • Highest 13 August, 2026

    107.7 °F

Climate (2021–2026)

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    61.1 °F

  • Average High 2021–2026

    73.9 °F
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