S
M
T
W
T
F
S
30
57°
37°
31
58°
37°
1
55°
39°
2
57°
40°
3
58°
35°
4
57°
33°
5
50°
34°
6
50°
34°
7
49°
33°
8
49°
37°
9
52°
35°
10
53°
28°
11
50°
35°
12
50°
20°
13
52°
31°
14
50°
26°
15
45°
24°
16
42°
26°
17
41°
24°
18
39°
21°
19
38°
20°
20
37°
19°
21
36°
20°
22
38°
24°
23
39°
27°
24
41°
26°
25
43°
26°
26
33°
24°
27
32°
14°
28
30°
15°
29
Hist. Avg.
31°
19°
30
Hist. Avg.
30°
19°
1
Hist. Avg.
30°
18°
2
Hist. Avg.
29°
17°
3
Hist. Avg.
28°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Umiat
Umiat's September 2026 forecast shows daily high temperatures ranging from 30° to 58°, with overnight lows between 14° and 40°. The average high for September is 46° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Umiat. See also: October | November | December.