S
M
T
W
T
F
S
26
81°
61°
27
81°
62°
28
80°
62°
29
80°
61°
30
74°
60°
31
74°
60°
1
76°
59°
2
77°
60°
3
78°
60°
4
80°
61°
5
81°
61°
6
82°
62°
7
83°
61°
8
81°
60°
9
82°
61°
10
83°
62°
11
83°
62°
12
81°
61°
13
82°
61°
14
73°
55°
15
77°
52°
16
72°
55°
17
78°
52°
18
76°
48°
19
72°
46°
20
70°
53°
21
72°
54°
22
71°
52°
23
71°
53°
24
79°
57°
25
71°
56°
26
75°
51°
27
79°
47°
28
70°
46°
29
68°
47°
30
70°
52°
31
71°
54°
1
68°
51°
2
75°
45°
3
71°
45°
4
72°
51°
5
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Roseau
Roseau's August 2026 forecast shows daily high temperatures ranging from 68° to 83°, with overnight lows between 45° and 62°. The average high for August is 76° with an average low of 56°. 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 Roseau. See also: September | October | November.
