S
M
T
W
T
F
S
30
83°
60°
31
87°
65°
1
87°
65°
2
83°
64°
3
87°
56°
4
80°
55°
5
79°
57°
6
80°
63°
7
85°
63°
8
85°
62°
9
80°
61°
10
79°
62°
11
84°
61°
12
85°
62°
13
84°
62°
14
84°
61°
15
83°
61°
16
83°
60°
17
81°
54°
18
79°
51°
19
74°
49°
20
74°
48°
21
72°
48°
22
73°
51°
23
73°
50°
24
76°
49°
25
73°
55°
26
77°
56°
27
73°
55°
28
78°
55°
29
77°
54°
30
77°
51°
1
73°
52°
2
76°
54°
3
70°
46°
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 70° to 87°, with overnight lows between 46° and 65°. The average high for September is 79° with an average low of 57°. 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.
