S
M
T
W
T
F
S
30
75°
56°
31
75°
60°
1
76°
63°
2
75°
63°
3
80°
62°
4
82°
63°
5
81°
62°
6
82°
63°
7
77°
62°
8
75°
61°
9
74°
61°
10
77°
62°
11
76°
62°
12
74°
60°
13
73°
60°
14
76°
58°
15
76°
59°
16
75°
59°
17
77°
58°
18
77°
60°
19
73°
59°
20
78°
59°
21
78°
57°
22
79°
51°
23
78°
51°
24
72°
55°
25
74°
56°
26
68°
55°
27
75°
57°
28
76°
56°
29
78°
57°
30
79°
58°
1
79°
55°
2
78°
55°
3
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barnesville
Barnesville's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 51° and 63°. The average high for September is 76° with an average low of 59°. 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 Barnesville. See also: October | November | December.