S
M
T
W
T
F
S
30
66°
55°
31
71°
55°
1
71°
53°
2
74°
59°
3
71°
60°
4
73°
53°
5
73°
53°
6
73°
58°
7
76°
56°
8
76°
57°
9
72°
61°
10
74°
57°
11
73°
59°
12
70°
59°
13
73°
58°
14
72°
57°
15
84°
62°
16
77°
59°
17
78°
59°
18
74°
58°
19
76°
58°
20
77°
59°
21
77°
59°
22
76°
58°
23
76°
58°
24
77°
57°
25
77°
58°
26
78°
59°
27
79°
59°
28
78°
58°
29
78°
59°
30
77°
57°
1
78°
58°
2
77°
57°
3
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Acorn
Acorn's September 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 53° and 62°. The average high for September is 76° with an average low of 58°. 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 Acorn. See also: October | November | December.