us Flag

SeaTac, USA Weather Averages

August is the hottest month in SeaTac with an average temperature of 19°C (65°F) and the coldest is December at 5°C (40°F). The wettest month is November with an average of 160mm of rain..

Average Temperature SeaTac

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature SeaTac

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall SeaTac

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

SeaTac : Next 24-Hour Weather

Today - 30th April 2025

Sunrise 05:53

Sunrise

Sunset 20:20

Sunset
0:00
Overcast
9°C (48°F)
1:00
Overcast
9°C (47°F)
2:00
Cloudy
9°C (47°F)
3:00
Partly cloudy
9°C (47°F)
4:00
Partly cloudy
8°C (46°F)
5:00
Mist
7°C (44°F)
6:00
Mist
7°C (44°F)
7:00
Mist
7°C (44°F)
8:00
Partly cloudy
8°C (46°F)
9:00
Clear
9°C (48°F)
10:00
Clear
11°C (50°F)
11:00
Partly cloudy
12°C (53°F)
12:00
Partly cloudy
14°C (56°F)
13:00
Partly cloudy
15°C (58°F)
14:00
Clear
16°C (60°F)
15:00
Clear
17°C (61°F)
16:00
Clear
17°C (62°F)
17:00
Clear
16°C (61°F)
18:00
Clear
16°C (59°F)
19:00
Clear
15°C (58°F)
20:00
Clear
13°C (55°F)
21:00
Clear
12°C (53°F)
22:00
Clear
10°C (50°F)
23:00
Clear
10°C (49°F)
Search for your next stay in SeaTac Choose from millions of homes, hotels and other properties all over the world