Mount St. Helens Aero Ranch Weather Forecast

    • 37
    • 47

    Mostly Sunny

    • 37
    • 48

    Mostly Cloudy

    • 40
    • 46

    Rain

    • 39
    • 46

    Rain

    • 39
    • 45

    Rain

    • 39
    • 45

    Rain Likely

Today 30 Dec South Washington Cascade Foothills

Widespread frost in the morning. Sunny. Highs in the upper 40s. East wind 5 to 10 Mph. Near the Gorge, east wind 20 to 25 Mph, easing to 15 Mph in the afternoon.

Tonight 30 Dec South Washington Cascade Foothills

Mostly clear in the Evening, then becoming partly cloudy. Areas of frost in the evening. Widespread frost after midnight. Lows in the lower 30s. East wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount St. Helens Aero Ranch Temperature Statistics

December Temperature

Southwest Washington Regional Airport (25.5 miles)

  • Lowest 1 December, 2025

    35.1 °F

  • Average December

    47.2 °F

  • Highest 15 December, 2025

    60.1 °F

Climate (2020–Present)

Southwest Washington Regional Airport (25.5 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    53 °F

  • Average High 2020–2025

    62.4 °F
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