S
M
T
W
T
F
S
30
89°
60°
31
90°
61°
1
89°
62°
2
91°
62°
3
90°
57°
4
82°
54°
5
84°
55°
6
82°
57°
7
85°
50°
8
77°
49°
9
78°
56°
10
78°
49°
11
76°
47°
12
75°
49°
13
76°
46°
14
74°
48°
15
75°
47°
16
75°
45°
17
73°
47°
18
75°
47°
19
77°
45°
20
74°
47°
21
76°
46°
22
78°
47°
23
79°
51°
24
71°
44°
25
71°
48°
26
Hist. Avg.
74°
40°
27
Hist. Avg.
74°
40°
28
Hist. Avg.
73°
40°
29
Hist. Avg.
73°
39°
30
Hist. Avg.
72°
39°
1
Hist. Avg.
72°
39°
2
Hist. Avg.
72°
38°
3
Hist. Avg.
71°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Tremonton
Tremonton's September 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 44° and 62°. The average high for September is 79° with an average low of 51°. 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 Tremonton. See also: October | November | December.
