S
M
T
W
T
F
S
28
90°
82°
29
90°
84°
30
92°
79°
1
89°
82°
2
89°
84°
3
90°
82°
4
90°
83°
5
89°
83°
6
89°
82°
7
90°
83°
8
89°
82°
9
90°
83°
10
89°
82°
11
91°
81°
12
92°
83°
13
91°
84°
14
92°
82°
15
92°
83°
16
91°
84°
17
92°
82°
18
92°
82°
19
91°
81°
20
89°
82°
21
89°
81°
22
90°
81°
23
88°
80°
24
89°
82°
25
89°
82°
26
90°
81°
27
91°
82°
28
92°
82°
29
91°
81°
30
90°
82°
31
90°
83°
1
92°
82°
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 88° to 92°, with overnight lows between 80° and 84°. The average high for July is 90° with an average low of 82°. 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.
