S
M
T
W
T
F
S
26
83°
63°
27
81°
62°
28
86°
64°
29
87°
62°
30
79°
57°
31
79°
58°
1
81°
62°
2
87°
62°
3
83°
60°
4
88°
53°
5
82°
57°
6
87°
62°
7
91°
63°
8
90°
62°
9
91°
55°
10
82°
52°
11
80°
49°
12
77°
51°
13
79°
52°
14
79°
51°
15
77°
50°
16
79°
52°
17
80°
54°
18
81°
58°
19
87°
60°
20
88°
56°
21
86°
58°
22
87°
54°
23
83°
50°
24
76°
49°
25
76°
53°
26
77°
57°
27
79°
50°
28
80°
47°
29
75°
47°
30
74°
48°
31
75°
53°
1
82°
54°
2
79°
49°
3
73°
48°
4
74°
49°
5
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Marie
St. Marie's August 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 47° and 64°. The average high for August is 81° with an average low of 55°. 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 St. Marie. See also: September | October | November.
