S
M
T
W
T
F
S
30
83°
63°
31
85°
66°
1
77°
58°
2
74°
56°
3
76°
57°
4
77°
58°
5
75°
56°
6
73°
54°
7
78°
62°
8
78°
62°
9
79°
61°
10
75°
58°
11
73°
54°
12
78°
60°
13
73°
57°
14
74°
56°
15
76°
58°
16
79°
59°
17
79°
59°
18
78°
54°
19
70°
50°
20
69°
49°
21
73°
58°
22
75°
56°
23
77°
51°
24
67°
48°
25
67°
49°
26
68°
47°
27
66°
46°
28
71°
53°
29
73°
50°
30
71°
55°
1
69°
48°
2
64°
45°
3
64°
48°
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 64° to 85°, with overnight lows between 45° and 66°. The average high for September is 74° with an average low of 55°. 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.