Seattle-Tacoma International Airport Weather Forecast

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    Rain

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    Rain Likely

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    Rain Likely

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    Chance Rain

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    Chance Rain

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    Chance Rain

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    Chance Rain

Today 22 Dec Lowlands of Pierce and Southern King Counties

Partly sunny. A chance of rain in the Morning, then a slight chance of rain early in the afternoon. A chance of rain late in the afternoon. Highs in the mid to upper 40s. South wind 10 to 20 Mph.

Tonight 22 Dec Lowlands of Pierce and Southern King Counties

Becoming partly cloudy after midnight. Rain at Times in the Evening, then rain likely late in the evening. A slight chance of rain after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the mid to upper 30s. South wind 10 to 20 Mph. Gusts to 30 Mph in the evening.

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Seattle-Tacoma International Airport Temperature Statistics

December Temperature

Seattle, Seattle-Tacoma International Airport (0 miles)

  • Lowest 1 December, 2025

    36 °F

  • Average December

    47.4 °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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