S
M
T
W
T
F
S
30
84°
68°
31
86°
70°
1
88°
71°
2
88°
69°
3
75°
69°
4
82°
68°
5
75°
63°
6
73°
57°
7
75°
64°
8
77°
69°
9
80°
59°
10
76°
54°
11
77°
63°
12
77°
58°
13
74°
61°
14
73°
58°
15
69°
54°
16
66°
55°
17
72°
57°
18
69°
55°
19
68°
51°
20
71°
52°
21
70°
57°
22
67°
56°
23
70°
56°
24
74°
55°
25
74°
56°
26
73°
56°
27
73°
57°
28
75°
57°
29
74°
56°
30
74°
56°
1
71°
50°
2
66°
46°
3
60°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in River Hills
River Hills's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 43° and 69°. The average high for September is 72° with an average low of 56°. 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 Hills. See also: October | November | December.