South Twin Lake Weather Forecast

    • 56
    • 80

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

    • 55
    • 77

    Partly Sunny

    • 46
    • 69

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 53
    • 75

    Slight Chance Rain Showers

Today 18 Sep Okanogan Highlands

Sunny. Highs in the upper 70s to upper 80s.

Tonight 18 Sep Okanogan Highlands

Mostly clear. Lows in the upper 40s to upper 50s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

South Twin Lake Temperature Statistics

September Temperature

Deer Park, Deer Park Airport (48.5 miles)

  • Lowest 13 September, 2025

    46 °F

  • Average September

    69.3 °F

  • Highest 2 September, 2025

    99 °F

Climate (2020–Present)

Deer Park, Deer Park Airport (48.5 miles)

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

  • Average Low 2020–2025

    35.5 °F

  • Average 2020–2025

    48.1 °F

  • Average High 2020–2025

    60 °F
Get WillyWeather+ to remove ads