S
M
T
W
T
F
S
30
82°
59°
31
84°
60°
1
84°
57°
2
84°
66°
3
86°
63°
4
89°
64°
5
89°
67°
6
85°
64°
7
78°
63°
8
84°
57°
9
87°
58°
10
85°
56°
11
90°
64°
12
92°
64°
13
90°
70°
14
74°
56°
15
85°
52°
16
85°
61°
17
85°
71°
18
81°
58°
19
71°
54°
20
74°
50°
21
80°
54°
22
73°
49°
23
80°
50°
24
83°
54°
25
84°
57°
26
81°
57°
27
83°
56°
28
77°
51°
29
75°
53°
30
80°
52°
1
78°
53°
2
74°
46°
3
72°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in American Fork
American Fork's September 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 42° and 57°. The average high for September is 78° with an average low of 52°. 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.
