S
M
T
W
T
F
S
30
91°
73°
31
94°
74°
1
94°
76°
2
95°
76°
3
96°
77°
4
95°
72°
5
96°
73°
6
97°
73°
7
85°
70°
8
86°
72°
9
87°
71°
10
91°
72°
11
95°
70°
12
92°
71°
13
90°
71°
14
88°
70°
15
87°
69°
16
85°
67°
17
86°
65°
18
78°
69°
19
79°
69°
20
80°
68°
21
83°
69°
22
81°
68°
23
84°
68°
24
82°
67°
25
78°
68°
26
81°
67°
27
82°
61°
28
76°
58°
29
75°
57°
30
75°
57°
1
76°
59°
2
75°
63°
3
74°
62°
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 74° to 97°, with overnight lows between 57° and 73°. The average high for September is 84° with an average low of 67°. 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.
