S
M
T
W
T
F
S
26
91°
80°
27
88°
78°
28
89°
77°
29
90°
83°
30
91°
83°
31
91°
82°
1
91°
83°
2
89°
84°
3
90°
79°
4
90°
82°
5
89°
84°
6
88°
81°
7
89°
81°
8
90°
81°
9
87°
80°
10
91°
84°
11
90°
84°
12
89°
76°
13
91°
77°
14
91°
80°
15
91°
80°
16
91°
84°
17
89°
79°
18
91°
77°
19
91°
85°
20
90°
83°
21
89°
82°
22
91°
82°
23
90°
83°
24
89°
83°
25
88°
82°
26
89°
82°
27
88°
83°
28
90°
81°
29
88°
82°
30
89°
83°
31
89°
80°
1
88°
81°
2
89°
80°
3
89°
81°
4
90°
81°
5
89°
80°
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 88° to 91°, with overnight lows between 80° and 83°. The average high for August is 89° 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 August weather will actually feel in Marathon. See also: September | October | November.
