S
M
T
W
T
F
S
30
78°
65°
31
74°
61°
1
74°
58°
2
75°
58°
3
74°
60°
4
76°
61°
5
78°
62°
6
75°
66°
7
79°
66°
8
83°
67°
9
90°
68°
10
85°
71°
11
81°
69°
12
78°
67°
13
77°
64°
14
78°
63°
15
78°
64°
16
76°
67°
17
76°
63°
18
75°
60°
19
76°
60°
20
74°
65°
21
76°
64°
22
75°
61°
23
78°
61°
24
76°
65°
25
75°
66°
26
78°
62°
27
79°
64°
28
76°
58°
29
79°
59°
30
77°
59°
1
75°
65°
2
78°
60°
3
94°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in El Rio
El Rio's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 El Rio. See also: October | November | December.