S
M
T
W
T
F
S
26
51°
30°
27
43°
30°
28
62°
34°
29
52°
44°
30
64°
42°
31
65°
40°
1
64°
49°
2
60°
49°
3
61°
49°
4
63°
53°
5
62°
47°
6
65°
47°
7
56°
47°
8
55°
45°
9
61°
45°
10
60°
46°
11
62°
44°
12
70°
40°
13
71°
42°
14
71°
55°
15
75°
57°
16
81°
52°
17
65°
45°
18
53°
41°
19
59°
39°
20
63°
41°
21
50°
42°
22
47°
34°
23
46°
25°
24
46°
41°
25
57°
35°
26
55°
29°
27
45°
33°
28
48°
30°
29
47°
30°
30
47°
29°
31
46°
29°
1
46°
30°
2
47°
27°
3
46°
29°
4
53°
33°
5
46°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Umiat
Umiat's August 2026 forecast shows daily high temperatures ranging from 45° to 81°, with overnight lows between 25° and 57°. The average high for August is 54° with an average low of 36°. 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 Umiat. See also: September | October | November.