Mount St Helens Weather Forecast

    • 54
    • 61

    Increasing Clouds

    • 60
    • 70

    Mostly Sunny

    • 56
    • 69

    Partly Sunny

    • 56
    • 63

    Partly Sunny

    • 52
    • 61

    Mostly Cloudy

    • 49
    • 57

    Mostly Cloudy

Today 1 Sep South Washington Cascades

Mostly sunny. Free air freezing level 13000 Feet, increasing to free air freezing level 14000 feet this afternoon. Winds light.

Tonight 1 Sep South Washington Cascades

Partly cloudy. Hazy after midnight. Free air freezing level 14000 feet. Winds light.

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Mount St Helens Temperature Statistics

September Temperature

Southwest Washington Regional Airport (33.6 miles)

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Climate (2020–Present)

Southwest Washington Regional Airport (33.6 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.3 °F
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