S
M
T
W
T
F
S
30
94°
69°
31
93°
69°
1
93°
68°
2
92°
69°
3
93°
69°
4
93°
68°
5
92°
63°
6
90°
62°
7
86°
61°
8
88°
64°
9
89°
64°
10
89°
58°
11
81°
55°
12
79°
59°
13
78°
63°
14
81°
56°
15
89°
53°
16
86°
53°
17
76°
52°
18
76°
53°
19
77°
51°
20
75°
50°
21
75°
51°
22
76°
51°
23
77°
52°
24
77°
52°
25
78°
57°
26
81°
58°
27
83°
59°
28
82°
50°
29
83°
49°
30
75°
50°
1
74°
49°
2
75°
48°
3
72°
55°
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 72° to 94°, with overnight lows between 48° and 69°. The average high for September is 83° 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.
