S
M
T
W
T
F
S
30
90°
71°
31
89°
68°
1
89°
66°
2
83°
64°
3
84°
67°
4
85°
67°
5
87°
68°
6
83°
66°
7
82°
64°
8
82°
65°
9
83°
64°
10
81°
64°
11
82°
65°
12
84°
64°
13
86°
63°
14
81°
62°
15
82°
63°
16
81°
63°
17
84°
62°
18
81°
62°
19
81°
66°
20
84°
65°
21
Hist. Avg.
82°
63°
22
Hist. Avg.
82°
62°
23
Hist. Avg.
81°
62°
24
Hist. Avg.
81°
62°
25
Hist. Avg.
81°
61°
26
Hist. Avg.
80°
61°
27
Hist. Avg.
80°
60°
28
Hist. Avg.
80°
60°
29
Hist. Avg.
80°
60°
30
Hist. Avg.
79°
59°
1
Hist. Avg.
79°
59°
2
Hist. Avg.
79°
58°
3
Hist. Avg.
78°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Riverdale
Riverdale's September 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 62° and 71°. The average high for September is 84° with an average low of 65°. 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.
