S
M
T
W
T
F
S
30
80°
66°
31
90°
71°
1
92°
68°
2
90°
71°
3
91°
72°
4
88°
69°
5
90°
69°
6
87°
67°
7
81°
65°
8
84°
67°
9
86°
62°
10
82°
60°
11
76°
54°
12
77°
54°
13
76°
55°
14
78°
53°
15
82°
59°
16
82°
58°
17
81°
59°
18
81°
59°
19
80°
58°
20
80°
58°
21
81°
59°
22
81°
59°
23
80°
58°
24
81°
58°
25
80°
57°
26
79°
55°
27
80°
56°
28
80°
56°
29
79°
55°
30
78°
55°
1
78°
54°
2
77°
55°
3
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar Falls
Cedar Falls's September 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 53° and 72°. The average high for September is 81° with an average low of 59°. 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 Cedar Falls. See also: October | November | December.
