S
M
T
W
T
F
S
30
77°
55°
31
76°
54°
1
78°
56°
2
78°
52°
3
76°
47°
4
69°
44°
5
68°
53°
6
69°
54°
7
75°
54°
8
76°
53°
9
75°
52°
10
70°
49°
11
73°
51°
12
74°
53°
13
74°
53°
14
73°
52°
15
74°
47°
16
72°
42°
17
65°
49°
18
71°
44°
19
66°
41°
20
66°
40°
21
61°
38°
22
61°
47°
23
62°
43°
24
62°
39°
25
60°
38°
26
60°
39°
27
61°
46°
28
68°
42°
29
67°
39°
30
61°
41°
1
60°
40°
2
60°
35°
3
58°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Indian River
Indian River's September 2026 forecast shows daily high temperatures ranging from 58° to 78°, with overnight lows between 35° and 56°. The average high for September is 68° with an average low of 46°. 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 Indian River. See also: October | November | December.
