S
M
T
W
T
F
S
26
84°
67°
27
79°
65°
28
79°
62°
29
80°
64°
30
82°
67°
31
85°
67°
1
84°
66°
2
82°
64°
3
86°
65°
4
83°
59°
5
80°
61°
6
81°
60°
7
80°
59°
8
78°
58°
9
78°
58°
10
79°
59°
11
81°
65°
12
84°
66°
13
83°
58°
14
81°
58°
15
79°
59°
16
80°
64°
17
79°
58°
18
79°
58°
19
80°
59°
20
80°
57°
21
82°
61°
22
84°
63°
23
85°
64°
24
86°
64°
25
86°
64°
26
87°
63°
27
85°
62°
28
84°
63°
29
84°
62°
30
82°
56°
31
79°
53°
1
76°
54°
2
76°
54°
3
77°
55°
4
77°
54°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Marys
St. Marys's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 53° and 67°. The average high for August is 81° with an average low of 61°. 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. Marys. See also: September | October | November.
