Copan Lake Weather Forecast

    • 31
    • 58

    Increasing Clouds

    • 41
    • 55

    Mostly Cloudy

    • 47
    • 66

    Partly Sunny

    • 54
    • 71

    Partly Sunny

    • 59
    • 77

    Partly Sunny

    • 54
    • 79

    Mostly Sunny

    • 46
    • 72

    Partly Sunny

Today 20 Dec Washington

Sunny. Highs in the upper 50s. Northwest Winds 5 to 10 Mph, becoming north 10 to 15 Mph with Gusts up to 25 Mph this afternoon.

Tonight 20 Dec Washington

Partly cloudy in the Evening, then becoming mostly clear. Cold with Lows in the lower 30s. Northeast Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Copan Lake Temperature Statistics

December Temperature

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

  • Lowest 14 December, 2025

    14 °F

  • Average December

    39.2 °F

  • Highest 11 December, 2025

    66.9 °F

Climate (2020–Present)

Bartlesville, Bartlesville Municipal Airport (11.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    72.8 °F
Get WillyWeather+ to remove ads