S
M
T
W
T
F
S
26
81°
62°
27
82°
71°
28
86°
72°
29
84°
71°
30
84°
67°
31
84°
64°
1
88°
69°
2
86°
76°
3
84°
71°
4
83°
73°
5
86°
75°
6
91°
75°
7
90°
73°
8
88°
74°
9
87°
72°
10
89°
71°
11
90°
71°
12
86°
71°
13
86°
69°
14
85°
71°
15
86°
68°
16
81°
66°
17
88°
72°
18
88°
71°
19
87°
72°
20
88°
71°
21
86°
70°
22
86°
71°
23
87°
71°
24
88°
70°
25
88°
71°
26
86°
71°
27
83°
70°
28
84°
70°
29
85°
69°
30
86°
70°
31
86°
70°
1
85°
69°
2
79°
66°
3
79°
65°
4
78°
66°
5
78°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint Marys City
Saint Marys City's August 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 64° and 76°. The average high for August is 86° with an average low of 70°. 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 Saint Marys City. See also: September | October | November.