Siouxon Co Park Weather Forecast

    • 37
    • 54

    Decreasing Clouds

    • 36
    • 52

    Partly Sunny

    • 45
    • 56

    Mostly Cloudy

    • 41
    • 58

    Mostly Cloudy

    • 45
    • 55

    Chance Rain

    • 43
    • 52

    Rain Likely

    • 42
    • 51

    Rain Likely

Today 31 Oct South Washington Cascade Foothills

Mostly cloudy with a 40 percent chance of rain. Highs in the upper 50s.

Tonight 31 Oct South Washington Cascade Foothills

Mostly cloudy this Evening, then becoming partly cloudy. Patchy fog. Patchy frost after midnight. Lows in the upper 30s. Winds light this Evening, becoming light and variable.

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  • Temperature Real-Time

Siouxon Co Park Temperature Statistics

October Temperature

Southwest Washington Regional Airport (29.2 miles)

  • Lowest 11 October, 2026

    36 °F

  • Average October

    54.5 °F

  • Highest 4 October, 2026

    79 °F

Climate (2021–2026)

Southwest Washington Regional Airport (29.2 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.6 °F
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