Simpson Lake Weather Forecast

    • 22
    • 33

    Decreasing Clouds

    • 17
    • 31

    Mostly Sunny

    • 17
    • 29

    Mostly Sunny

    • 20
    • 30

    Partly Sunny

    • 22
    • 31

    Mostly Cloudy

    • 25
    • 34

    Mostly Cloudy

Today 22 Jan Okanogan Highlands

Mostly cloudy. Highs in the upper 20s to lower 30s.

Tonight 22 Jan Okanogan Highlands

Partly cloudy. Lows 15 to 23.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Simpson Lake Temperature Statistics

January Temperature

Deer Park, Deer Park Airport (47.2 miles)

  • Lowest 1 January, 2026

    19.9 °F

  • Average January

    31.2 °F

  • Highest 13 January, 2026

    46.9 °F

Climate (2021–Present)

Deer Park, Deer Park Airport (47.2 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    60.1 °F
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