S
M
T
W
T
F
S
30
90°
69°
31
93°
71°
1
96°
70°
2
97°
71°
3
98°
73°
4
95°
71°
5
100°
70°
6
99°
70°
7
85°
70°
8
89°
67°
9
90°
70°
10
88°
70°
11
88°
71°
12
88°
71°
13
90°
68°
14
89°
67°
15
90°
66°
16
89°
66°
17
85°
63°
18
84°
64°
19
83°
62°
20
83°
61°
21
80°
60°
22
86°
64°
23
86°
64°
24
85°
63°
25
85°
63°
26
84°
62°
27
86°
63°
28
85°
63°
29
84°
62°
30
84°
62°
1
83°
61°
2
83°
60°
3
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McDonough
McDonough's September 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 58° and 71°. The average high for September is 86° with an average low of 64°. 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 McDonough. See also: October | November | December.
