S
M
T
W
T
F
S
30
93°
74°
31
96°
75°
1
97°
75°
2
96°
76°
3
96°
76°
4
94°
75°
5
96°
76°
6
96°
76°
7
95°
75°
8
96°
76°
9
95°
76°
10
95°
75°
11
94°
75°
12
94°
73°
13
93°
74°
14
94°
75°
15
93°
74°
16
94°
75°
17
94°
75°
18
93°
74°
19
94°
75°
20
94°
70°
21
93°
68°
22
89°
69°
23
88°
69°
24
88°
70°
25
89°
69°
26
89°
72°
27
92°
73°
28
93°
73°
29
93°
72°
30
91°
73°
1
92°
71°
2
92°
71°
3
91°
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 88° to 97°, with overnight lows between 68° 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.
