S
M
T
W
T
F
S
30
79°
63°
31
81°
62°
1
83°
61°
2
76°
56°
3
74°
55°
4
75°
57°
5
78°
57°
6
81°
61°
7
82°
62°
8
82°
62°
9
83°
61°
10
82°
61°
11
81°
60°
12
82°
62°
13
83°
63°
14
80°
54°
15
70°
54°
16
71°
56°
17
75°
55°
18
69°
52°
19
70°
47°
20
70°
50°
21
78°
53°
22
78°
55°
23
77°
48°
24
71°
48°
25
70°
50°
26
75°
55°
27
75°
55°
28
76°
50°
29
67°
44°
30
66°
47°
1
67°
48°
2
74°
48°
3
75°
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 66° to 83°, with overnight lows between 44° and 63°. The average high for September is 76° 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.