S
M
T
W
T
F
S
30
82°
68°
31
82°
69°
1
83°
69°
2
82°
68°
3
82°
61°
4
80°
58°
5
79°
59°
6
80°
60°
7
83°
60°
8
85°
64°
9
86°
65°
10
82°
58°
11
79°
58°
12
79°
60°
13
80°
57°
14
78°
56°
15
75°
57°
16
77°
56°
17
76°
55°
18
77°
60°
19
79°
57°
20
77°
60°
21
81°
61°
22
80°
63°
23
82°
62°
24
78°
61°
25
76°
61°
26
76°
60°
27
77°
60°
28
81°
59°
29
82°
59°
30
80°
58°
1
80°
60°
2
81°
54°
3
80°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Riverwood
Riverwood's September 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 49° and 69°. The average high for September is 80° with an average low of 60°. 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 Riverwood. See also: October | November | December.
