S
M
T
W
T
F
S
26
83°
67°
27
81°
67°
28
80°
68°
29
80°
68°
30
84°
69°
1
84°
69°
2
85°
70°
3
85°
70°
4
84°
64°
5
81°
62°
6
78°
62°
7
79°
63°
8
80°
63°
9
83°
66°
10
85°
67°
11
85°
69°
12
84°
71°
13
83°
71°
14
81°
70°
15
82°
71°
16
82°
71°
17
81°
70°
18
80°
71°
19
80°
71°
20
82°
70°
21
83°
69°
22
83°
67°
23
84°
67°
24
83°
69°
25
87°
69°
26
89°
69°
27
89°
70°
28
88°
69°
29
89°
71°
30
90°
73°
31
92°
74°
1
92°
73°
2
91°
75°
3
92°
71°
4
92°
73°
5
88°
73°
6
90°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
Allergies-September Weather in Houston
Houston's Allergies-September 2026 forecast shows daily high temperatures ranging from 78° to 92°, with overnight lows between 62° and 75°. The average high for Allergies-September is 85° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how Allergies-September weather will actually feel in Houston. See also: June | July | August.
