S
M
T
W
T
F
S
26
94°
71°
27
95°
72°
28
95°
72°
29
94°
73°
30
95°
73°
31
96°
72°
1
95°
72°
2
96°
73°
3
96°
73°
4
95°
72°
5
96°
73°
6
96°
73°
7
95°
70°
8
92°
70°
9
92°
71°
10
94°
72°
11
95°
72°
12
96°
71°
13
95°
72°
14
93°
71°
15
94°
70°
16
90°
69°
17
91°
67°
18
91°
67°
19
90°
66°
20
87°
67°
21
88°
64°
22
84°
59°
23
83°
58°
24
83°
57°
25
84°
57°
26
82°
58°
27
83°
57°
28
83°
60°
29
86°
62°
30
89°
64°
31
90°
64°
1
90°
63°
2
91°
64°
3
90°
63°
4
90°
64°
5
89°
62°
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 82° to 96°, with overnight lows between 57° and 73°. The average high for August is 91° with an average low of 67°. 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.
