S
M
T
W
T
F
S
30
91°
71°
31
92°
71°
1
94°
70°
2
97°
73°
3
96°
73°
4
95°
72°
5
97°
73°
6
97°
71°
7
87°
71°
8
89°
70°
9
90°
67°
10
92°
70°
11
90°
72°
12
87°
73°
13
91°
72°
14
94°
69°
15
93°
72°
16
90°
73°
17
91°
66°
18
94°
66°
19
92°
68°
20
87°
66°
21
89°
68°
22
84°
67°
23
80°
64°
24
79°
61°
25
78°
56°
26
77°
57°
27
79°
56°
28
77°
57°
29
78°
57°
30
76°
59°
1
78°
58°
2
77°
55°
3
81°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newnan
Newnan's September 2026 forecast shows daily high temperatures ranging from 76° to 92°, with overnight lows between 55° and 68°. The average high for September is 81° with an average low of 61°. 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 Newnan. See also: October | November | December.
