S
M
T
W
T
F
S
30
86°
66°
31
85°
65°
1
86°
64°
2
86°
65°
3
84°
65°
4
84°
61°
5
79°
59°
6
79°
58°
7
81°
63°
8
85°
62°
9
85°
63°
10
84°
64°
11
83°
62°
12
81°
61°
13
82°
60°
14
83°
59°
15
84°
61°
16
74°
55°
17
74°
58°
18
Hist. Avg.
80°
57°
19
Hist. Avg.
80°
56°
20
Hist. Avg.
79°
56°
21
Hist. Avg.
79°
55°
22
Hist. Avg.
79°
55°
23
Hist. Avg.
78°
55°
24
Hist. Avg.
78°
54°
25
Hist. Avg.
78°
54°
26
Hist. Avg.
77°
54°
27
Hist. Avg.
77°
53°
28
Hist. Avg.
76°
53°
29
Hist. Avg.
76°
52°
30
Hist. Avg.
76°
52°
1
Hist. Avg.
75°
52°
2
Hist. Avg.
75°
51°
3
Hist. Avg.
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Houston
Houston's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 55° and 66°. The average high for September is 82° with an average low of 62°. 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.
