Mount St Helens Weather Forecast

    • 50
    • 63

    Sunny

    • 44
    • 60

    Partly Sunny

    • 43
    • 51

    Partly Sunny

    • 44
    • 52

    Partly Sunny

    • 46
    • 51

    Partly Sunny

    • 48
    • 57

    Partly Sunny

Today 17 Jul South Washington Cascades

Sunny. Free air freezing level 16000 Feet, decreasing to free air freezing level 15000 feet this afternoon. West wind 5 to 10 Mph.

Tonight 17 Jul South Washington Cascades

Clear. Free air freezing level 16000 Feet, decreasing to free air freezing level 15000 feet after midnight. Northwest wind 5 to 10 Mph.

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Mount St Helens Temperature Statistics

July Temperature

Southwest Washington Regional Airport (33.6 miles)

  • Lowest 5 July, 2025

    48 °F

  • Average July

    66.9 °F

  • Highest 13 July, 2025

    95 °F

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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