S
M
T
W
T
F
S
28
68°
54°
29
64°
53°
30
64°
52°
1
64°
52°
2
68°
53°
3
73°
57°
4
72°
56°
5
77°
54°
6
85°
57°
7
75°
53°
8
71°
57°
9
79°
54°
10
78°
56°
11
73°
55°
12
72°
54°
13
78°
57°
14
83°
57°
15
81°
57°
16
80°
57°
17
82°
59°
18
83°
58°
19
81°
57°
20
80°
59°
21
82°
61°
22
85°
58°
23
82°
57°
24
79°
58°
25
81°
59°
26
81°
60°
27
82°
62°
28
83°
61°
29
75°
57°
30
74°
56°
31
73°
54°
1
73°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in SeaTac
SeaTac's July 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 54° and 62°. The average high for July is 79° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in SeaTac. See also: August | September | October.
