S
M
T
W
T
F
S
30
85°
63°
31
82°
62°
1
78°
64°
2
78°
67°
3
81°
64°
4
82°
68°
5
84°
68°
6
85°
61°
7
83°
63°
8
77°
60°
9
77°
60°
10
78°
66°
11
80°
60°
12
81°
61°
13
76°
60°
14
75°
65°
15
79°
66°
16
82°
58°
17
81°
57°
18
74°
57°
19
72°
58°
20
73°
62°
21
73°
59°
22
74°
57°
23
72°
62°
24
72°
60°
25
73°
61°
26
76°
62°
27
77°
58°
28
78°
55°
29
71°
60°
30
70°
60°
1
72°
61°
2
76°
58°
3
75°
53°
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 85°, with overnight lows between 53° and 68°. The average high for September is 77° with an average low of 61°. 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.
