S
M
T
W
T
F
S
30
93°
71°
31
94°
69°
1
96°
69°
2
97°
70°
3
97°
72°
4
98°
71°
5
98°
71°
6
97°
73°
7
89°
74°
8
91°
69°
9
94°
66°
10
94°
64°
11
90°
67°
12
90°
73°
13
92°
68°
14
96°
67°
15
96°
70°
16
93°
66°
17
92°
65°
18
92°
65°
19
93°
69°
20
90°
70°
21
88°
66°
22
85°
63°
23
83°
65°
24
84°
62°
25
83°
63°
26
84°
61°
27
85°
64°
28
85°
65°
29
84°
64°
30
85°
64°
1
85°
63°
2
84°
64°
3
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Old Harmony
Old Harmony's September 2026 forecast shows daily high temperatures ranging from 83° to 96°, with overnight lows between 61° and 70°. The average high for September is 88° with an average low of 65°. 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 Old Harmony. See also: October | November | December.
