S
M
T
W
T
F
S
30
94°
70°
31
93°
70°
1
92°
69°
2
92°
69°
3
91°
68°
4
92°
68°
5
92°
69°
6
91°
68°
7
91°
67°
8
90°
67°
9
91°
68°
10
92°
67°
11
91°
68°
12
90°
68°
13
91°
67°
14
89°
63°
15
88°
64°
16
91°
64°
17
90°
63°
18
86°
62°
19
87°
63°
20
89°
63°
21
88°
62°
22
81°
61°
23
78°
59°
24
77°
58°
25
80°
60°
26
85°
60°
27
85°
59°
28
84°
60°
29
85°
60°
30
84°
56°
1
82°
49°
2
75°
49°
3
74°
53°
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 74° to 94°, with overnight lows between 49° and 70°. The average high for September is 87° with an average low of 63°. 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.
