Mount St Helens Weather Forecast

    • 38
    • 50

    Rain

    • 35
    • 42

    Rain Showers

    • 37
    • 38

    Rain/Snow

    • 38
    • 38

    Rain Likely

    • 39
    • 40

    Chance Rain

    • 39
    • 40

    Slight Chance Rain/Snow

Today 25 Jun South Washington Cascades

Partly sunny in the Morning, then becoming mostly cloudy. Free air freezing level 12000 Feet, decreasing to free air freezing level 11000 feet in the afternoon. Southwest wind 5 to 10 Mph.

Tonight 25 Jun South Washington Cascades

A chance of rain in the Evening, then rain after midnight. Snow level above 8000 feet. Southwest wind 5 to 10 Mph. Chance of rain near 100 percent. Rainfall Amounts a tenth to a quarter of an inch.

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Mount St Helens Temperature Statistics

June Temperature

Southwest Washington Regional Airport (33.6 miles)

  • Lowest 1 June, 2026

    44.1 °F

  • Average June

    63.5 °F

  • Highest 14 June, 2026

    93 °F

Climate (2021–2026)

Southwest Washington Regional Airport (33.6 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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