S
M
T
W
T
F
S
30
87°
66°
31
88°
67°
1
91°
66°
2
90°
66°
3
91°
69°
4
92°
70°
5
92°
70°
6
91°
69°
7
91°
69°
8
90°
70°
9
89°
68°
10
89°
68°
11
88°
67°
12
87°
67°
13
89°
66°
14
88°
67°
15
88°
67°
16
87°
66°
17
87°
65°
18
83°
65°
19
87°
64°
20
81°
64°
21
82°
63°
22
82°
64°
23
84°
64°
24
86°
63°
25
86°
62°
26
85°
63°
27
87°
61°
28
85°
61°
29
84°
60°
30
84°
61°
1
82°
59°
2
85°
61°
3
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mer Rouge
Mer Rouge's September 2026 forecast shows daily high temperatures ranging from 78° to 92°, with overnight lows between 55° and 70°. The average high for September is 87° with an average low of 65°. 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 Mer Rouge. See also: October | November | December.
