S
M
T
W
T
F
S
31
90°
76°
1
91°
75°
2
89°
74°
3
89°
74°
4
88°
74°
5
89°
73°
6
89°
75°
7
88°
77°
8
91°
76°
9
90°
78°
10
88°
77°
11
89°
75°
12
89°
76°
13
90°
77°
14
90°
77°
15
92°
76°
16
93°
77°
17
93°
77°
18
92°
76°
19
91°
76°
20
90°
75°
21
91°
76°
22
93°
77°
23
93°
76°
24
88°
77°
25
89°
78°
26
89°
78°
27
90°
77°
28
89°
76°
29
89°
77°
30
90°
78°
1
90°
78°
2
91°
77°
3
92°
78°
4
92°
78°
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 88° to 93°, with overnight lows between 73° and 78°. The average high for Allergies-September is 90° with an average low of 76°. 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: July | August | September.
