S
M
T
W
T
F
S
26
76°
59°
27
75°
58°
28
79°
59°
29
80°
59°
30
78°
58°
31
77°
60°
1
77°
59°
2
76°
60°
3
78°
60°
4
82°
59°
5
76°
55°
6
76°
59°
7
80°
58°
8
77°
52°
9
73°
51°
10
73°
52°
11
74°
58°
12
74°
58°
13
77°
59°
14
79°
59°
15
79°
58°
16
76°
57°
17
75°
49°
18
76°
50°
19
79°
58°
20
81°
57°
21
77°
58°
22
78°
57°
23
80°
57°
24
75°
54°
25
74°
52°
26
73°
50°
27
72°
51°
28
72°
52°
29
73°
53°
30
78°
54°
31
79°
56°
1
79°
56°
2
78°
55°
3
79°
48°
4
72°
46°
5
71°
49°
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 71° to 82°, with overnight lows between 46° and 60°. The average high for August is 77° 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. Marys. See also: September | October | November.
