S
M
T
W
T
F
S
30
89°
76°
31
87°
75°
1
89°
75°
2
89°
74°
3
90°
74°
4
88°
72°
5
89°
73°
6
91°
74°
7
93°
73°
8
95°
72°
9
94°
71°
10
93°
71°
11
92°
73°
12
88°
73°
13
87°
72°
14
88°
74°
15
90°
74°
16
88°
73°
17
88°
73°
18
89°
72°
19
87°
73°
20
86°
73°
21
87°
72°
22
91°
71°
23
91°
73°
24
89°
73°
25
85°
69°
26
85°
70°
27
84°
66°
28
83°
65°
29
82°
66°
30
83°
70°
1
84°
71°
2
90°
64°
3
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Houston
Houston's September 2026 forecast shows daily high temperatures ranging from 82° to 95°, with overnight lows between 64° and 76°. The average high for September is 88° with an average low of 72°. 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 Houston. See also: October | November | December.
