S
M
T
W
T
F
S
26
65°
57°
27
62°
55°
28
57°
46°
29
51°
42°
30
57°
45°
31
59°
52°
1
59°
47°
2
75°
47°
3
74°
52°
4
67°
51°
5
60°
48°
6
58°
47°
7
59°
52°
8
61°
52°
9
55°
53°
10
56°
51°
11
56°
47°
12
58°
49°
13
55°
50°
14
61°
50°
15
54°
51°
16
56°
50°
17
56°
49°
18
60°
50°
19
57°
51°
20
57°
50°
21
64°
50°
22
57°
49°
23
59°
46°
24
66°
52°
25
60°
47°
26
57°
49°
27
56°
49°
28
59°
49°
29
54°
51°
30
60°
55°
31
63°
56°
1
63°
55°
2
56°
42°
3
45°
44°
4
54°
43°
5
53°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Umnak
Umnak's August 2026 forecast shows daily high temperatures ranging from 45° to 66°, with overnight lows between 42° and 56°. The average high for August is 57° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Umnak. See also: September | October | November.
