S
M
T
W
T
F
S
30
100°
62°
31
101°
71°
1
100°
70°
2
99°
71°
3
98°
71°
4
101°
70°
5
103°
71°
6
105°
72°
7
102°
71°
8
103°
69°
9
101°
75°
10
98°
73°
11
90°
69°
12
98°
69°
13
96°
67°
14
97°
72°
15
97°
71°
16
97°
73°
17
97°
72°
18
97°
68°
19
95°
64°
20
94°
64°
21
95°
69°
22
93°
66°
23
87°
67°
24
82°
57°
25
85°
54°
26
85°
58°
27
80°
61°
28
88°
59°
29
91°
67°
30
90°
73°
1
84°
68°
2
75°
61°
3
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harvey
Harvey's September 2026 forecast shows daily high temperatures ranging from 75° to 91°, with overnight lows between 58° and 73°. The average high for September is 84° with an average low of 64°. 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 Harvey. See also: October | November | December.
