S
M
T
W
T
F
S
30
91°
59°
31
91°
61°
1
89°
55°
2
81°
54°
3
82°
54°
4
83°
53°
5
82°
53°
6
84°
54°
7
88°
58°
8
88°
59°
9
89°
59°
10
89°
58°
11
85°
58°
12
81°
57°
13
87°
58°
14
86°
55°
15
84°
54°
16
84°
55°
17
82°
56°
18
79°
55°
19
77°
47°
20
74°
45°
21
Hist. Avg.
78°
50°
22
Hist. Avg.
77°
50°
23
Hist. Avg.
77°
49°
24
Hist. Avg.
76°
49°
25
Hist. Avg.
76°
48°
26
Hist. Avg.
76°
48°
27
Hist. Avg.
75°
47°
28
Hist. Avg.
74°
47°
29
Hist. Avg.
74°
46°
30
Hist. Avg.
74°
46°
1
Hist. Avg.
73°
46°
2
Hist. Avg.
72°
45°
3
Hist. Avg.
72°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in American Fork
American Fork's September 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 45° and 61°. The average high for September is 84° with an average low of 55°. 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 American Fork. See also: October | November | December.
