SeaTac Weather Forecast 15 Days, Weather in SeaTac Today
Current weather conditions and 15 day weather forecast for SeaTac, Washington, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at SeaTac
| 24 December 2025 Wednesday 4.4 ° C / 39.9°F  Overcast |
Feels Like : 1.4 ° C / 34.6°F Humidity : % 86 Pressure : 998 mb Wind Speed : 12.6 kmph / 7.8 miles from NNE  Visibility : 16 km Precipitation (rainfall) : 0.07 mm Cloud (%) : 100 |
15 day weather forecast for SeaTac, WA, USA
Weather Forecast for next 15 Days for SeaTac including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in SeaTac, Washington state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 24 December 2025 Wednesday |  Patchy rain nearby |
3.8 ° C (38.8°F) |
12.8 ° C (55°F) |
7.3 ° C (45.1°F) |
% 79 | 89% | 0.1 | Sunrise:07:56 AM Sunset: 04:22 PM |
Moonrise:10:55 AM Moonset: 09:20 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Overcast |
4.5 ° C (40.1°F) |
7.3 ° C (45.1°F) |
5.9 ° C (42.6°F) |
% 83 | 0% | 0.1 | Sunrise:07:56 AM Sunset: 04:23 PM |
Moonrise:11:13 AM Moonset: 10:33 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Patchy rain nearby |
3.2 ° C (37.8°F) |
6.2 ° C (43.2°F) |
4.8 ° C (40.6°F) |
% 93 | 88% | 0 | Sunrise:07:56 AM Sunset: 04:24 PM |
Moonrise:11:29 AM Moonset: 11:47 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
2.9 ° C (37.3°F) |
5.4 ° C (41.7°F) |
4.1 ° C (39.4°F) |
% 86 | 89% | 0.1 | Sunrise:07:56 AM Sunset: 04:25 PM |
Moonrise:11:45 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday |  Sunny |
1.3 ° C (34.3°F) |
5.3 ° C (41.6°F) |
3 ° C (37.4°F) |
% 86 | 0% | 0 | Sunrise:07:57 AM Sunset: 04:25 PM |
Moonrise:12:02 PM Moonset: 01:04 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday |  Partly Cloudy |
1.5 ° C (34.7°F) |
5.5 ° C (41.9°F) |
3.1 ° C (37.6°F) |
% 82 | 0% | 2 | Sunrise:07:57 AM Sunset: 04:26 PM |
Moonrise:12:23 PM Moonset: 02:24 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Sunny |
2.6 ° C (36.7°F) |
8.2 ° C (46.8°F) |
4.7 ° C (40.5°F) |
% 78 | 0% | 2 | Sunrise:07:57 AM Sunset: 04:27 PM |
Moonrise:12:50 PM Moonset: 03:50 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Sunny |
3.3 ° C (38°F) |
9.4 ° C (49°F) |
5.6 ° C (42.2°F) |
% 76 | 0% | 3 | Sunrise:07:57 AM Sunset: 04:28 PM |
Moonrise:01:28 PM Moonset: 05:17 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Partly Cloudy |
3.8 ° C (38.9°F) |
8.8 ° C (47.9°F) |
5.8 ° C (42.4°F) |
% 67 | 0% | 3 | Sunrise:07:57 AM Sunset: 04:29 PM |
Moonrise:02:19 PM Moonset: 06:39 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 January 2026 Friday | Overcast |
6.3 ° C (43.4°F) |
7.5 ° C (45.5°F) |
6.9 ° C (44.4°F) |
% 83 | 0% | 2 | Sunrise:07:57 AM Sunset: 04:30 PM |
Moonrise:03:29 PM Moonset: 07:49 AM Moon Phase ( Waxing Gibbous ) |
|
| 03 January 2026 Saturday | Patchy rain nearby |
6 ° C (42.8°F) |
8.8 ° C (47.9°F) |
7.4 ° C (45.3°F) |
% 86 | 89% | 2 | Sunrise:07:57 AM Sunset: 04:31 PM |
Moonrise:04:49 PM Moonset: 08:42 AM Moon Phase ( Full Moon ) |
|
| 04 January 2026 Sunday | Patchy rain nearby |
6.5 ° C (43.6°F) |
10.4 ° C (50.7°F) |
7.8 ° C (46°F) |
% 86 | 89% | 2 | Sunrise:07:57 AM Sunset: 04:32 PM |
Moonrise:06:14 PM Moonset: 09:21 AM Moon Phase ( Waning Gibbous ) |
|
| 05 January 2026 Monday | Patchy rain nearby |
7 ° C (44.5°F) |
9.5 ° C (49.1°F) |
8 ° C (46.3°F) |
% 86 | 82% | 2 | Sunrise:07:56 AM Sunset: 04:33 PM |
Moonrise:07:38 PM Moonset: 09:48 AM Moon Phase ( Waning Gibbous ) |
|
| 06 January 2026 Tuesday | Patchy rain nearby |
6.3 ° C (43.4°F) |
9.6 ° C (49.3°F) |
8 ° C (46.4°F) |
% 85 | 89% | 2 | Sunrise:07:56 AM Sunset: 04:34 PM |
Moonrise:08:56 PM Moonset: 10:09 AM Moon Phase ( Waning Gibbous ) |
|
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