S
M
T
W
T
F
S
30
93°
64°
31
86°
67°
1
90°
68°
2
87°
69°
3
91°
68°
4
92°
69°
5
91°
68°
6
90°
67°
7
88°
66°
8
87°
65°
9
88°
64°
10
86°
63°
11
88°
65°
12
88°
65°
13
90°
66°
14
90°
64°
15
Hist. Avg.
86°
62°
16
Hist. Avg.
86°
62°
17
Hist. Avg.
85°
61°
18
Hist. Avg.
85°
61°
19
Hist. Avg.
85°
60°
20
Hist. Avg.
84°
60°
21
Hist. Avg.
84°
60°
22
Hist. Avg.
84°
59°
23
Hist. Avg.
83°
59°
24
Hist. Avg.
83°
58°
25
Hist. Avg.
82°
58°
26
Hist. Avg.
82°
58°
27
Hist. Avg.
82°
57°
28
Hist. Avg.
81°
57°
29
Hist. Avg.
81°
56°
30
Hist. Avg.
81°
56°
1
Hist. Avg.
80°
56°
2
Hist. Avg.
80°
55°
3
Hist. Avg.
80°
55°
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 86° to 93°, with overnight lows between 63° and 69°. The average high for September is 89° with an average low of 66°. 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.
