S
M
T
W
T
F
S
30
75°
47°
31
80°
42°
1
83°
60°
2
74°
58°
3
68°
54°
4
76°
48°
5
74°
43°
6
78°
51°
7
62°
50°
8
64°
50°
9
71°
52°
10
56°
42°
11
78°
41°
12
71°
54°
13
59°
41°
14
64°
39°
15
68°
50°
16
62°
43°
17
64°
38°
18
57°
32°
19
64°
35°
20
53°
30°
21
60°
28°
22
67°
33°
23
71°
38°
24
70°
46°
25
68°
51°
26
67°
48°
27
71°
49°
28
70°
48°
29
70°
54°
30
63°
50°
1
62°
43°
2
61°
40°
3
58°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in River Heights
River Heights's September 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 40° and 54°. The average high for September is 66° with an average low of 47°. 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 River Heights. See also: October | November | December.
