S
M
T
W
T
F
S
26
89°
74°
27
89°
74°
28
90°
73°
29
89°
74°
30
92°
74°
31
92°
73°
1
91°
74°
2
92°
75°
3
93°
75°
4
94°
74°
5
94°
75°
6
93°
75°
7
94°
74°
8
94°
75°
9
93°
74°
10
93°
74°
11
92°
73°
12
93°
75°
13
93°
74°
14
92°
74°
15
93°
73°
16
93°
74°
17
93°
72°
18
92°
72°
19
93°
73°
20
92°
71°
21
93°
72°
22
88°
71°
23
93°
72°
24
92°
68°
25
89°
67°
26
88°
66°
27
87°
66°
28
87°
65°
29
88°
65°
30
87°
66°
31
88°
67°
1
91°
66°
2
90°
66°
3
91°
69°
4
92°
70°
5
92°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mer Rouge
Mer Rouge's August 2026 forecast shows daily high temperatures ranging from 87° to 94°, with overnight lows between 65° and 75°. The average high for August is 91° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mer Rouge. See also: September | October | November.