Seattle Weather Forecast

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    Rain

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    Rain

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    Rain

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    Chance Rain

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    Chance Rain

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    Chance Rain

Today 20 Dec City of Seattle

Breezy. Rain likely in the Morning, then rain at Times in the afternoon. Rainfall Amounts a tenth to a quarter of an inch possible. Highs in the mid to upper 40s. South wind 15 to 25 Mph.

Tonight 20 Dec City of Seattle

Breezy. Rain at Times in the Evening, then rain likely after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the lower to mid 40s. South wind 15 to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Seattle Temperature Statistics

December Temperature

Boeing Field - King County International Airport (3.7 miles)

  • Lowest 1 December, 2025

    34 °F

  • Average December

    49.4 °F

  • Highest 15 December, 2025

    59 °F

Climate (2020–Present)

Boeing Field - King County International Airport (3.7 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    54.1 °F

  • Average High 2020–2025

    61.5 °F
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