S
M
T
W
T
F
S
30
95°
75°
31
96°
76°
1
96°
75°
2
95°
76°
3
96°
76°
4
96°
75°
5
95°
76°
6
96°
76°
7
96°
75°
8
94°
76°
9
95°
75°
10
95°
74°
11
94°
73°
12
94°
74°
13
93°
74°
14
94°
73°
15
94°
74°
16
92°
74°
17
93°
73°
18
92°
73°
19
92°
72°
20
93°
73°
21
93°
73°
22
92°
72°
23
92°
72°
24
91°
71°
25
90°
72°
26
90°
72°
27
92°
70°
28
92°
72°
29
91°
71°
30
91°
72°
1
90°
69°
2
92°
70°
3
92°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rio Hondo
Rio Hondo's September 2026 forecast shows daily high temperatures ranging from 90° to 96°, with overnight lows between 69° and 76°. The average high for September is 93° with an average low of 73°. 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 Rio Hondo. See also: October | November | December.
