S
M
T
W
T
F
S
30
99°
67°
31
100°
74°
1
100°
75°
2
100°
77°
3
98°
76°
4
100°
75°
5
98°
74°
6
103°
74°
7
99°
69°
8
101°
74°
9
99°
74°
10
98°
72°
11
95°
71°
12
95°
70°
13
96°
71°
14
92°
68°
15
95°
71°
16
94°
71°
17
95°
68°
18
86°
62°
19
87°
66°
20
89°
67°
21
90°
67°
22
89°
66°
23
89°
66°
24
88°
65°
25
89°
66°
26
87°
65°
27
88°
65°
28
87°
64°
29
86°
65°
30
86°
63°
1
80°
55°
2
74°
53°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harp
Harp's September 2026 forecast shows daily high temperatures ranging from 74° to 103°, with overnight lows between 52° and 74°. The average high for September is 91° with an average low of 67°. 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 Harp. See also: October | November | December.
