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
| 15 May 2026 Friday 8.9 ° C / 48°F  Partly cloudy |
Feels Like : 6.9 ° C / 44.5°F Humidity : % 86 Pressure : 1020 mb Wind Speed : 12.2 kmph / 7.6 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 May 2026 Friday |  Moderate rain |
6.8 ° C (44.3°F) |
10.7 ° C (51.3°F) |
8.9 ° C (48°F) |
% 86 | 92% | 3.4 | Sunrise:05:32 AM Sunset: 08:40 PM |
Moonrise:04:24 AM Moonset: 07:56 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday | Moderate rain |
5.4 ° C (41.7°F) |
12.3 ° C (54.2°F) |
8.6 ° C (47.5°F) |
% 86 | 89% | 4.8 | Sunrise:05:31 AM Sunset: 08:41 PM |
Moonrise:04:53 AM Moonset: 09:25 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Partly Cloudy |
5.9 ° C (42.6°F) |
16 ° C (60.9°F) |
10.8 ° C (51.4°F) |
% 65 | 0% | 4.9 | Sunrise:05:30 AM Sunset: 08:42 PM |
Moonrise:05:34 AM Moonset: 10:47 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday |  Patchy rain nearby |
7.7 ° C (45.8°F) |
17.5 ° C (63.5°F) |
12.1 ° C (53.8°F) |
% 63 | 87% | 5.9 | Sunrise:05:29 AM Sunset: 08:43 PM |
Moonrise:06:28 AM Moonset: 11:55 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday | Patchy rain nearby |
9.3 ° C (48.8°F) |
18.6 ° C (65.6°F) |
12.1 ° C (53.8°F) |
% 77 | 88% | 0 | Sunrise:05:28 AM Sunset: 08:45 PM |
Moonrise:07:40 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday |  Sunny |
8.4 ° C (47°F) |
21.5 ° C (70.7°F) |
15.1 ° C (59.2°F) |
% 65 | 0% | 5 | Sunrise:05:27 AM Sunset: 08:46 PM |
Moonrise:09:01 AM Moonset: 12:45 AM Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Partly Cloudy |
11.3 ° C (52.4°F) |
27.4 ° C (81.3°F) |
18.9 ° C (66.1°F) |
% 56 | 0% | 5 | Sunrise:05:26 AM Sunset: 08:47 PM |
Moonrise:10:24 AM Moonset: 01:22 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Partly Cloudy |
10.1 ° C (50.1°F) |
19.1 ° C (66.3°F) |
14.2 ° C (57.5°F) |
% 59 | 0% | 4 | Sunrise:05:24 AM Sunset: 08:48 PM |
Moonrise:11:45 AM Moonset: 01:48 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday |  Overcast |
9.6 ° C (49.3°F) |
17.4 ° C (63.4°F) |
12.6 ° C (54.7°F) |
% 58 | 0% | 3 | Sunrise:05:23 AM Sunset: 08:49 PM |
Moonrise:01:01 PM Moonset: 02:08 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Partly Cloudy |
7.3 ° C (45.1°F) |
19.4 ° C (67°F) |
13.2 ° C (55.7°F) |
% 62 | 0% | 4 | Sunrise:05:23 AM Sunset: 08:50 PM |
Moonrise:02:14 PM Moonset: 02:25 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Patchy rain nearby |
7.2 ° C (44.9°F) |
14 ° C (57.2°F) |
9.9 ° C (49.8°F) |
% 70 | 86% | 2 | Sunrise:05:22 AM Sunset: 08:52 PM |
Moonrise:03:24 PM Moonset: 02:40 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Partly Cloudy |
4.9 ° C (40.8°F) |
17.7 ° C (63.8°F) |
11.1 ° C (52°F) |
% 55 | 0% | 4 | Sunrise:05:21 AM Sunset: 08:53 PM |
Moonrise:04:33 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 May 2026 Wednesday | Sunny |
5.1 ° C (41.2°F) |
19.3 ° C (66.7°F) |
12.6 ° C (54.7°F) |
% 58 | 0% | 4 | Sunrise:05:20 AM Sunset: 08:54 PM |
Moonrise:05:42 PM Moonset: 03:12 AM Moon Phase ( Waxing Gibbous ) |
|
| 28 May 2026 Thursday | Sunny |
6.8 ° C (44.2°F) |
21.9 ° C (71.5°F) |
14.7 ° C (58.5°F) |
% 54 | 0% | 4 | Sunrise:05:19 AM Sunset: 08:55 PM |
Moonrise:06:52 PM Moonset: 03:30 AM Moon Phase ( Waxing Gibbous ) |
|
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