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
80°
64°
6
71°
60°
7
72°
58°
8
81°
61°
9
84°
64°
10
79°
58°
11
79°
57°
12
78°
58°
13
79°
59°
14
80°
58°
15
79°
59°
16
80°
58°
17
79°
59°
18
77°
58°
19
82°
61°
20
77°
54°
21
75°
54°
22
76°
55°
23
77°
54°
24
78°
56°
25
81°
59°
26
83°
62°
27
81°
61°
28
82°
61°
29
83°
62°
30
81°
62°
31
79°
61°
1
80°
61°
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 71° to 84°, with overnight lows between 54° and 64°. The average high for July is 79° with an average low of 59°. 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.
