S
M
T
W
T
F
S
30
79°
56°
31
77°
53°
1
74°
55°
2
75°
54°
3
75°
55°
4
76°
54°
5
73°
54°
6
74°
58°
7
73°
59°
8
77°
56°
9
74°
53°
10
74°
53°
11
73°
54°
12
72°
55°
13
71°
54°
14
72°
53°
15
73°
57°
16
76°
50°
17
75°
51°
18
74°
51°
19
70°
57°
20
74°
50°
21
Hist. Avg.
70°
52°
22
Hist. Avg.
70°
51°
23
Hist. Avg.
70°
51°
24
Hist. Avg.
69°
51°
25
Hist. Avg.
69°
50°
26
Hist. Avg.
69°
50°
27
Hist. Avg.
68°
50°
28
Hist. Avg.
68°
49°
29
Hist. Avg.
68°
49°
30
Hist. Avg.
67°
49°
1
Hist. Avg.
67°
48°
2
Hist. Avg.
66°
48°
3
Hist. Avg.
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in River Rouge
River Rouge's September 2026 forecast shows daily high temperatures ranging from 70° to 79°, with overnight lows between 50° and 59°. The average high for September is 74° with an average low of 54°. 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 Rouge. See also: October | November | December.