Seattle-Tacoma International Airport Weather Forecast

    • 33
    • 45

    Mostly Cloudy

    • 33
    • 44

    Mostly Cloudy

    • 40
    • 45

    Rain Likely

    • 42
    • 50

    Rain Likely

    • 42
    • 49

    Rain Likely

    • 40
    • 48

    Chance Rain

    • 38
    • 48

    Chance Rain

Today 30 Dec Lowlands of Pierce and Southern King Counties

Partly sunny. Patchy fog until late afternoon. Highs in the 40s. Light wind.

Tonight 30 Dec Lowlands of Pierce and Southern King Counties

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows in the upper 20s to mid 30s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Seattle-Tacoma International Airport Temperature Statistics

December Temperature

Seattle, Seattle-Tacoma International Airport (0 miles)

  • Lowest 28 December, 2025

    30.9 °F

  • Average December

    45.5 °F

  • Highest 10 December, 2025

    57 °F

Climate (2020–Present)

Seattle, Seattle-Tacoma International Airport (0 miles)

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  • Average Low 2020–2025

    46.6 °F

  • Average 2020–2025

    53.3 °F

  • Average High 2020–2025

    61.2 °F
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