S
M
T
W
T
F
S
30
75°
50°
31
81°
45°
1
79°
47°
2
70°
57°
3
69°
59°
4
83°
56°
5
72°
54°
6
73°
50°
7
80°
55°
8
81°
52°
9
70°
64°
10
80°
55°
11
73°
49°
12
71°
51°
13
77°
54°
14
75°
52°
15
73°
53°
16
74°
52°
17
72°
50°
18
71°
47°
19
74°
52°
20
74°
51°
21
65°
51°
22
64°
50°
23
67°
51°
24
71°
50°
25
70°
50°
26
71°
48°
27
65°
43°
28
67°
46°
29
71°
49°
30
72°
49°
1
71°
48°
2
70°
49°
3
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Steep Falls
Steep Falls's September 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 43° and 64°. The average high for September is 72° 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 Steep Falls. See also: October | November | December.