S
M
T
W
T
F
S
26
79°
60°
27
80°
57°
28
79°
55°
29
78°
60°
30
80°
61°
31
82°
57°
1
81°
54°
2
78°
54°
3
77°
56°
4
77°
54°
5
78°
53°
6
77°
54°
7
78°
55°
8
79°
58°
9
77°
61°
10
77°
61°
11
78°
62°
12
82°
60°
13
79°
61°
14
83°
54°
15
76°
53°
16
76°
54°
17
78°
54°
18
77°
52°
19
76°
53°
20
75°
52°
21
76°
54°
22
76°
52°
23
74°
59°
24
77°
58°
25
74°
54°
26
79°
60°
27
80°
60°
28
79°
59°
29
82°
58°
30
82°
51°
31
73°
51°
1
73°
50°
2
74°
55°
3
75°
57°
4
74°
50°
5
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marathon
Marathon's August 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 49° and 62°. The average high for August is 78° with an average low of 56°. 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 Marathon. See also: September | October | November.
