S
M
T
W
T
F
S
30
68°
47°
31
67°
47°
1
66°
46°
2
65°
39°
3
65°
47°
4
63°
47°
5
63°
46°
6
59°
46°
7
60°
45°
8
62°
45°
9
58°
43°
10
57°
44°
11
61°
39°
12
59°
43°
13
57°
41°
14
56°
39°
15
55°
39°
16
54°
37°
17
Hist. Avg.
54°
39°
18
Hist. Avg.
54°
39°
19
Hist. Avg.
53°
39°
20
Hist. Avg.
53°
38°
21
Hist. Avg.
53°
38°
22
Hist. Avg.
52°
38°
23
Hist. Avg.
52°
38°
24
Hist. Avg.
52°
37°
25
Hist. Avg.
51°
37°
26
Hist. Avg.
51°
37°
27
Hist. Avg.
50°
36°
28
Hist. Avg.
50°
36°
29
Hist. Avg.
50°
36°
30
Hist. Avg.
49°
35°
1
Hist. Avg.
49°
35°
2
Hist. Avg.
48°
35°
3
Hist. Avg.
48°
34°
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 54° to 68°, with overnight lows between 37° and 47°. The average high for September is 61° with an average low of 43°. 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.
