South Twin Lake Weather Forecast

    • 47
    • 69

    Mostly Sunny

    • 53
    • 73

    Increasing Clouds

    • 47
    • 74

    Partly Sunny

    • 49
    • 66

    Mostly Cloudy

    • 47
    • 63

    Chance Rain Showers

    • 45
    • 65

    Slight Chance Rain Showers

    • 48
    • 67

    Partly Sunny

Today 8 Sep Okanogan Highlands

Sunny. Highs in the upper 60s to mid 70s.

Tonight 8 Sep Okanogan Highlands

Mostly clear. Lows in the mid 40s to lower 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Twin Lake Temperature Statistics

September Temperature

Deer Park, Deer Park Airport (48.5 miles)

  • Lowest 5 September, 2026

    40.6 °F

  • Average September

    58.4 °F

  • Highest 1 September, 2026

    81.6 °F

Climate (2021–2026)

Deer Park, Deer Park Airport (48.5 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    60.1 °F
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