S
M
T
W
T
F
S
30
98°
76°
31
95°
76°
1
88°
77°
2
97°
80°
3
87°
78°
4
92°
78°
5
93°
76°
6
89°
76°
7
98°
76°
8
95°
78°
9
91°
76°
10
90°
76°
11
95°
74°
12
99°
78°
13
95°
75°
14
98°
77°
15
98°
77°
16
96°
75°
17
90°
76°
18
94°
72°
19
95°
72°
20
97°
72°
21
97°
76°
22
99°
75°
23
99°
77°
24
96°
69°
25
94°
69°
26
91°
75°
27
93°
75°
28
91°
76°
29
89°
77°
30
85°
67°
1
87°
69°
2
88°
70°
3
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in George Bush Intercontinental Houston Airport
George Bush Intercontinental Houston Airport's September 2026 forecast shows daily high temperatures ranging from 85° to 96°, with overnight lows between 67° and 77°. The average high for September is 90° with an average low of 71°. 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 George Bush Intercontinental Houston Airport. See also: October | November | December.
