S
M
T
W
T
F
S
30
80°
59°
31
80°
68°
1
84°
66°
2
69°
64°
3
87°
67°
4
85°
71°
5
79°
66°
6
77°
60°
7
79°
55°
8
80°
56°
9
84°
60°
10
86°
69°
11
80°
60°
12
80°
55°
13
81°
65°
14
72°
49°
15
72°
53°
16
78°
63°
17
83°
66°
18
82°
56°
19
76°
62°
20
79°
58°
21
71°
56°
22
67°
52°
23
70°
53°
24
70°
52°
25
73°
53°
26
72°
54°
27
71°
55°
28
75°
53°
29
75°
52°
30
69°
48°
1
67°
49°
2
69°
53°
3
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Riverdale
Riverdale's September 2026 forecast shows daily high temperatures ranging from 67° to 83°, with overnight lows between 48° and 66°. The average high for September is 73° 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 Riverdale. See also: October | November | December.
