S
M
T
W
T
F
S
30
78°
65°
31
86°
71°
1
90°
72°
2
96°
70°
3
89°
66°
4
78°
67°
5
77°
59°
6
78°
55°
7
77°
55°
8
82°
54°
9
80°
66°
10
81°
63°
11
77°
53°
12
82°
62°
13
82°
52°
14
71°
44°
15
82°
61°
16
73°
66°
17
72°
63°
18
75°
55°
19
66°
57°
20
63°
62°
21
63°
50°
22
54°
50°
23
67°
60°
24
67°
49°
25
68°
48°
26
72°
48°
27
71°
48°
28
72°
52°
29
73°
58°
30
73°
59°
1
70°
55°
2
68°
50°
3
72°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Monroe
South Monroe's September 2026 forecast shows daily high temperatures ranging from 67° to 73°, with overnight lows between 48° and 59°. The average high for September is 71° with an average low of 52°. 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 South Monroe. See also: October | November | December.