S
M
T
W
T
F
S
30
80°
52°
31
81°
57°
1
80°
57°
2
80°
50°
3
79°
46°
4
72°
47°
5
71°
54°
6
74°
55°
7
79°
49°
8
72°
47°
9
71°
49°
10
72°
54°
11
70°
53°
12
78°
55°
13
78°
53°
14
77°
52°
15
77°
46°
16
72°
51°
17
68°
44°
18
71°
43°
19
68°
42°
20
66°
40°
21
64°
42°
22
66°
49°
23
66°
42°
24
67°
41°
25
66°
49°
26
70°
48°
27
69°
49°
28
73°
46°
29
72°
42°
30
67°
43°
1
64°
45°
2
70°
45°
3
66°
47°
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 64° to 81°, with overnight lows between 40° and 57°. The average high for September is 72° with an average low of 48°. 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.
