S
M
T
W
T
F
S
30
83°
60°
31
87°
67°
1
83°
70°
2
91°
69°
3
91°
69°
4
79°
67°
5
79°
60°
6
78°
56°
7
79°
54°
8
83°
57°
9
87°
67°
10
81°
69°
11
80°
62°
12
74°
61°
13
83°
65°
14
72°
52°
15
82°
50°
16
85°
64°
17
82°
68°
18
76°
58°
19
78°
66°
20
74°
59°
21
69°
60°
22
70°
61°
23
70°
60°
24
71°
55°
25
69°
54°
26
71°
52°
27
74°
56°
28
74°
56°
29
72°
54°
30
73°
50°
1
75°
56°
2
71°
55°
3
67°
56°
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 67° to 82°, with overnight lows between 50° and 68°. The average high for September is 73° 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 Barnesville. See also: October | November | December.