Castle Lake Weather Forecast

    • 34
    • 47

    Snow

    • 31
    • 41

    Rain/Snow

    • 30
    • 41

    Snow

    • 34
    • 50

    Chance Rain

    • 40
    • 58

    Mostly Cloudy

    • 43
    • 63

    Partly Sunny

Today 31 Mar South Washington Cascades

Mostly cloudy with a chance of snow and rain. Snow level 4000 feet in the afternoon. No snow accumulation. Southeast wind 5 to 10 Mph, becoming south in the afternoon. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an inch.

Tonight 31 Mar South Washington Cascades

Partly cloudy. Free air freezing level 4000 feet. East wind 5 to 10 Mph.

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Castle Lake Temperature Statistics

March Temperature

Southwest Washington Regional Airport (30.4 miles)

  • Lowest 22 March, 2026

    28.9 °F
  • Average March

    47.4 °F
  • Highest 16 March, 2026

    66 °F

Climate (2021–Present)

Southwest Washington Regional Airport (30.4 miles)

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  • Average Low 2021–2026

    45.1 °F
  • Average 2021–2026

    53 °F
  • Average High 2021–2026

    62.5 °F
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