S
M
T
W
T
F
S
26
87°
59°
27
86°
63°
28
91°
57°
29
85°
53°
30
80°
54°
31
86°
54°
1
82°
53°
2
80°
56°
3
85°
60°
4
83°
60°
5
89°
63°
6
90°
62°
7
91°
57°
8
83°
59°
9
87°
61°
10
89°
62°
11
86°
63°
12
90°
61°
13
89°
58°
14
81°
61°
15
82°
60°
16
85°
57°
17
84°
52°
18
78°
52°
19
81°
51°
20
77°
51°
21
78°
52°
22
Hist. Avg.
83°
56°
23
Hist. Avg.
83°
56°
24
Hist. Avg.
82°
55°
25
Hist. Avg.
82°
55°
26
Hist. Avg.
82°
54°
27
Hist. Avg.
81°
54°
28
Hist. Avg.
81°
54°
29
Hist. Avg.
81°
53°
30
Hist. Avg.
80°
53°
31
Hist. Avg.
80°
53°
1
Hist. Avg.
79°
52°
2
Hist. Avg.
79°
52°
3
Hist. Avg.
78°
52°
4
Hist. Avg.
78°
51°
5
Hist. Avg.
78°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in St. Marie
St. Marie's August 2026 forecast shows daily high temperatures ranging from 77° to 91°, with overnight lows between 51° and 63°. The average high for August is 85° with an average low of 57°. 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.
