S
M
T
W
T
F
S
30
88°
70°
31
91°
70°
1
95°
70°
2
95°
72°
3
95°
72°
4
93°
70°
5
90°
70°
6
93°
70°
7
86°
70°
8
88°
70°
9
90°
66°
10
90°
70°
11
90°
73°
12
86°
72°
13
90°
70°
14
91°
66°
15
91°
68°
16
88°
63°
17
90°
65°
18
93°
67°
19
87°
67°
20
85°
66°
21
87°
66°
22
83°
67°
23
80°
65°
24
82°
64°
25
82°
63°
26
82°
59°
27
80°
60°
28
82°
61°
29
83°
57°
30
84°
61°
1
84°
61°
2
81°
62°
3
82°
62°
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 80° to 93°, with overnight lows between 57° and 67°. The average high for September is 84° with an average low of 63°. 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.