Monthly Historical AveragesSeaTac, WA
Average Temperature
High
18°
Feels 18
Low
9°
Feels 8
Average Precipitation
10 Days
57mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, May 17, 2026
Day
16°Feels 16
Wind
8 km/h N
Gust
12 km/h
Humidity
51%
P.O.P
20%
Night
7°Feels 6
Wind
8 km/h S
Gust
12 km/h
Humidity
100%
P.O.P
30%
Historical AveragesMay 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity