Forecast

    Forecast for SeaTac, WA | Forecast Periods: 14
    Monday
    Mar 16
    2026

    SeaTac, WA

    Updated: 8:00 AM PDT

    57°F

    Light Rain

    9 mph SSW
    Precipitation: 76%

    Rain before 1pm. Cloudy, with a high near 57. South southwest wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.

    Hourly Forecast

    MON12:00
    49°F
    Chance Light Rain
    Dewpoint:7.8°Precip:28%Humidity:91%Wind:8 mph SSW
    MON13:00
    51°F
    Cloudy
    Dewpoint:8.9°Precip:14%Humidity:88%Wind:9 mph SSW
    MON14:00
    53°F
    Cloudy
    Dewpoint:8.9°Precip:12%Humidity:84%Wind:9 mph SSW
    MON15:00
    54°F
    Mostly Cloudy
    Dewpoint:9.4°Precip:9%Humidity:83%Wind:9 mph SSW
    MON16:00
    55°F
    Mostly Cloudy
    Dewpoint:9.4°Precip:8%Humidity:80%Wind:9 mph SSW
    TUE17:00
    56°F
    Cloudy
    Dewpoint:10°Precip:9%Humidity:79%Wind:9 mph SSW
    TUE18:00
    55°F
    Cloudy
    Dewpoint:10°Precip:7%Humidity:83%Wind:9 mph SSW
    TUE19:00
    54°F
    Mostly Cloudy
    Dewpoint:10°Precip:5%Humidity:85%Wind:8 mph SSW
    TUE20:00
    53°F
    Slight Chance Light Rain
    Dewpoint:9.4°Precip:15%Humidity:86%Wind:8 mph SSW
    TUE21:00
    51°F
    Chance Light Rain
    Dewpoint:8.9°Precip:25%Humidity:88%Wind:8 mph SSW
    TUE22:00
    51°F
    Chance Light Rain
    Dewpoint:8.9°Precip:32%Humidity:88%Wind:8 mph SSW
    TUE23:00
    50°F
    Chance Light Rain
    Dewpoint:8.3°Precip:34%Humidity:90%Wind:8 mph SSW
    TUE00:00
    50°F
    Chance Light Rain
    Dewpoint:8.3°Precip:46%Humidity:90%Wind:9 mph SSW
    TUE01:00
    50°F
    Light Rain Likely
    Dewpoint:8.3°Precip:67%Humidity:89%Wind:9 mph SSW
    TUE02:00
    50°F
    Light Rain Likely
    Dewpoint:8.3°Precip:64%Humidity:89%Wind:9 mph SSW
    TUE03:00
    49°F
    Light Rain Likely
    Dewpoint:8.3°Precip:56%Humidity:93%Wind:9 mph SSW
    TUE04:00
    49°F
    Light Rain Likely
    Dewpoint:8.3°Precip:74%Humidity:92%Wind:9 mph SSW
    TUE05:00
    49°F
    Light Rain
    Dewpoint:8.3°Precip:92%Humidity:93%Wind:9 mph SSW
    TUE06:00
    48°F
    Light Rain
    Dewpoint:7.8°Precip:92%Humidity:93%Wind:9 mph SSW
    TUE07:00
    49°F
    Light Rain
    Dewpoint:8.3°Precip:92%Humidity:92%Wind:9 mph S
    TUE08:00
    49°F
    Light Rain
    Dewpoint:8.3°Precip:92%Humidity:93%Wind:9 mph S
    TUE09:00
    50°F
    Light Rain
    Dewpoint:8.9°Precip:92%Humidity:92%Wind:9 mph S
    TUE10:00
    50°F
    Light Rain
    Dewpoint:8.9°Precip:92%Humidity:92%Wind:9 mph S
    TUE11:00
    51°F
    Light Rain
    Dewpoint:9.4°Precip:96%Humidity:92%Wind:9 mph S

    Extended Forecast

    Tonight

    Tue, Mar 17
    48°F
    Light Rain
    9 mph SSW
    Precipitation: 92%
    Rain after 8pm. Cloudy, with a low around 48. South southwest wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

    Tuesday

    Tue, Mar 17
    55°F
    Light Rain
    9 mph SSW
    Precipitation: 96%
    Rain. Cloudy, with a high near 55. South southwest wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Tuesday Night

    Wed, Mar 18
    50°F
    Light Rain
    9 mph S
    Precipitation: 95%
    Rain. Cloudy, with a low around 50. South wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Wednesday

    Wed, Mar 18
    56°F
    Light Rain
    8 mph SSW
    Precipitation: 95%
    Rain. Cloudy, with a high near 56. South southwest wind around 8 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Wednesday Night

    Thu, Mar 19
    51°F
    Light Rain
    8 mph S
    Precipitation: 91%
    Rain. Cloudy, with a low around 51. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.

    Thursday

    Thu, Mar 19
    58°F
    Light Rain
    9 mph SSW
    Precipitation: 89%
    Rain. Cloudy, with a high near 58.

    Thursday Night

    Fri, Mar 20
    50°F
    Light Rain
    6 mph SSW
    Precipitation: 86%
    Rain. Cloudy, with a low around 50.

    Friday

    Fri, Mar 20
    56°F
    Light Rain
    8 mph SSW
    Precipitation: 76%
    Rain. Cloudy, with a high near 56.

    Friday Night

    Sat, Mar 21
    41°F
    Light Rain Likely
    7 mph S
    Precipitation: 56%
    Rain likely. Mostly cloudy, with a low around 41.

    Saturday

    Sat, Mar 21
    52°F
    Chance Light Rain
    5 mph SW
    Precipitation: 42%
    A chance of rain. Partly sunny, with a high near 52.

    Saturday Night

    Sun, Mar 22
    38°F
    Slight Chance Light Rain
    5 mph SSW
    Precipitation: 23%
    A slight chance of rain. Partly cloudy, with a low around 38.

    Sunday

    Sun, Mar 22
    53°F
    Chance Light Rain
    5 mph N
    Precipitation: 29%
    A chance of rain. Mostly sunny, with a high near 53.

    Sunday Night

    Mon, Mar 23
    38°F
    Chance Light Rain
    5 mph NE
    Precipitation: 37%
    A chance of rain. Mostly cloudy, with a low around 38.

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