S
M
T
W
T
F
S
28
81°
54°
29
84°
54°
30
88°
61°
1
91°
70°
2
91°
64°
3
90°
68°
4
79°
64°
5
77°
64°
6
72°
64°
7
75°
61°
8
85°
66°
9
87°
66°
10
78°
61°
11
80°
55°
12
82°
58°
13
85°
61°
14
89°
65°
15
86°
62°
16
83°
59°
17
81°
57°
18
81°
57°
19
78°
59°
20
79°
59°
21
80°
58°
22
76°
55°
23
77°
54°
24
85°
61°
25
84°
61°
26
84°
62°
27
83°
63°
28
83°
62°
29
84°
62°
30
83°
61°
31
77°
61°
1
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Marathon
Marathon's July 2026 forecast shows daily high temperatures ranging from 76° to 89°, with overnight lows between 54° and 66°. The average high for July is 82° with an average low of 60°. 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 Marathon. See also: August | September | October.
