S
M
T
W
T
F
S
30
90°
62°
31
86°
62°
1
87°
61°
2
81°
61°
3
80°
54°
4
80°
56°
5
81°
59°
6
79°
55°
7
78°
52°
8
78°
51°
9
79°
51°
10
80°
55°
11
82°
53°
12
82°
50°
13
83°
50°
14
79°
52°
15
76°
52°
16
77°
48°
17
76°
52°
18
83°
61°
19
82°
54°
20
79°
49°
21
80°
54°
22
82°
58°
23
84°
52°
24
81°
49°
25
82°
52°
26
80°
49°
27
71°
47°
28
70°
43°
29
69°
41°
30
69°
45°
1
71°
45°
2
74°
53°
3
77°
49°
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 69° to 90°, with overnight lows between 41° and 62°. The average high for September is 79° 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.
