S
M
T
W
T
F
S
30
89°
77°
31
89°
77°
1
90°
76°
2
89°
76°
3
88°
75°
4
88°
76°
5
89°
76°
6
88°
76°
7
90°
75°
8
92°
76°
9
89°
75°
10
90°
74°
11
91°
75°
12
90°
74°
13
90°
74°
14
91°
73°
15
88°
74°
16
87°
73°
17
87°
73°
18
Hist. Avg.
88°
72°
19
Hist. Avg.
88°
71°
20
Hist. Avg.
88°
71°
21
Hist. Avg.
88°
71°
22
Hist. Avg.
87°
71°
23
Hist. Avg.
87°
70°
24
Hist. Avg.
87°
70°
25
Hist. Avg.
86°
70°
26
Hist. Avg.
86°
69°
27
Hist. Avg.
86°
69°
28
Hist. Avg.
86°
69°
29
Hist. Avg.
86°
68°
30
Hist. Avg.
85°
68°
1
Hist. Avg.
85°
68°
2
Hist. Avg.
85°
67°
3
Hist. Avg.
84°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harvey
Harvey's September 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 73° and 77°. The average high for September is 89° with an average low of 75°. 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.
