S
M
T
W
T
F
S
28
97°
73°
29
98°
73°
30
99°
77°
1
95°
75°
2
95°
70°
3
96°
73°
4
98°
73°
5
90°
74°
6
90°
74°
7
89°
74°
8
91°
75°
9
93°
73°
10
94°
74°
11
95°
73°
12
87°
73°
13
88°
72°
14
90°
73°
15
94°
74°
16
91°
73°
17
92°
74°
18
93°
72°
19
89°
73°
20
94°
75°
21
92°
74°
22
91°
74°
23
89°
73°
24
88°
73°
25
87°
72°
26
89°
74°
27
88°
72°
28
89°
73°
29
89°
74°
30
90°
74°
31
90°
73°
1
91°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. Marks
St. Marks's July 2026 forecast shows daily high temperatures ranging from 87° to 95°, with overnight lows between 72° and 75°. The average high for July is 90° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in St. Marks. See also: August | September | October.