S
M
T
W
T
F
S
30
85°
56°
31
83°
53°
1
77°
50°
2
74°
45°
3
75°
45°
4
74°
54°
5
78°
47°
6
79°
47°
7
83°
47°
8
91°
48°
9
95°
57°
10
93°
61°
11
92°
63°
12
87°
62°
13
83°
59°
14
84°
58°
15
85°
59°
16
88°
61°
17
86°
57°
18
87°
58°
19
87°
59°
20
84°
61°
21
81°
58°
22
85°
59°
23
83°
62°
24
85°
61°
25
80°
54°
26
77°
57°
27
74°
52°
28
73°
49°
29
75°
52°
30
75°
53°
1
80°
56°
2
78°
52°
3
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harden Flat
Harden Flat's September 2026 forecast shows daily high temperatures ranging from 73° to 88°, with overnight lows between 49° and 62°. The average high for September is 82° with an average low of 57°. 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 Harden Flat. See also: October | November | December.
