S
M
T
W
T
F
S
30
82°
67°
31
91°
70°
1
97°
74°
2
95°
71°
3
92°
73°
4
92°
73°
5
81°
66°
6
78°
62°
7
79°
63°
8
87°
71°
9
89°
64°
10
76°
59°
11
77°
62°
12
81°
64°
13
84°
63°
14
76°
60°
15
79°
61°
16
77°
59°
17
76°
60°
18
75°
55°
19
76°
61°
20
77°
60°
21
74°
59°
22
70°
59°
23
72°
58°
24
77°
59°
25
78°
59°
26
78°
58°
27
77°
60°
28
79°
60°
29
78°
59°
30
78°
59°
1
75°
53°
2
70°
48°
3
63°
44°
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 63° to 89°, with overnight lows between 44° and 71°. The average high for September is 77° with an average low of 59°. 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.
