S
M
T
W
T
F
S
30
83°
62°
31
83°
61°
1
85°
61°
2
84°
60°
3
81°
61°
4
83°
61°
5
82°
60°
6
77°
60°
7
78°
59°
8
78°
54°
9
80°
53°
10
77°
59°
11
81°
59°
12
82°
58°
13
79°
59°
14
80°
57°
15
81°
58°
16
83°
58°
17
Hist. Avg.
78°
52°
18
Hist. Avg.
77°
52°
19
Hist. Avg.
77°
52°
20
Hist. Avg.
76°
51°
21
Hist. Avg.
76°
50°
22
Hist. Avg.
76°
50°
23
Hist. Avg.
75°
50°
24
Hist. Avg.
75°
49°
25
Hist. Avg.
74°
48°
26
Hist. Avg.
74°
48°
27
Hist. Avg.
74°
48°
28
Hist. Avg.
73°
47°
29
Hist. Avg.
73°
47°
30
Hist. Avg.
72°
46°
1
Hist. Avg.
72°
46°
2
Hist. Avg.
71°
45°
3
Hist. Avg.
71°
45°
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 77° to 85°, with overnight lows between 53° and 62°. The average high for September is 81° with an average low of 59°. 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.
