S
M
T
W
T
F
S
26
65°
57°
27
62°
55°
28
55°
47°
29
54°
48°
30
52°
48°
31
55°
46°
1
55°
48°
2
52°
49°
3
54°
49°
4
59°
55°
5
61°
52°
6
56°
54°
7
55°
51°
8
56°
49°
9
58°
48°
10
54°
45°
11
52°
46°
12
53°
47°
13
52°
46°
14
52°
46°
15
53°
47°
16
52°
47°
17
52°
50°
18
53°
49°
19
53°
46°
20
52°
47°
21
52°
48°
22
53°
48°
23
52°
47°
24
52°
46°
25
52°
47°
26
51°
46°
27
51°
46°
28
52°
47°
29
52°
49°
30
53°
49°
31
52°
48°
1
52°
48°
2
53°
49°
3
52°
48°
4
52°
47°
5
51°
48°
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 51° to 61°, with overnight lows between 45° and 55°. The average high for August is 53° with an average low of 48°. 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.
