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
83°
68°
18
78°
59°
19
73°
57°
20
74°
63°
21
63°
53°
22
61°
57°
23
63°
51°
24
65°
41°
25
68°
45°
26
69°
45°
27
71°
47°
28
71°
48°
29
72°
53°
30
74°
59°
1
73°
57°
2
73°
54°
3
72°
52°
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 63° to 74°, with overnight lows between 41° and 59°. The average high for September is 70° with an average low of 50°. 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.