S
M
T
W
T
F
S
26
82°
54°
27
81°
53°
28
81°
52°
29
80°
51°
30
79°
50°
31
81°
53°
1
82°
52°
2
82°
53°
3
81°
53°
4
82°
52°
5
82°
52°
6
81°
51°
7
81°
52°
8
80°
52°
9
81°
51°
10
81°
52°
11
80°
51°
12
74°
51°
13
78°
50°
14
74°
47°
15
72°
48°
16
73°
51°
17
77°
50°
18
75°
48°
19
77°
50°
20
76°
48°
21
73°
47°
22
71°
50°
23
72°
50°
24
72°
49°
25
73°
48°
26
72°
46°
27
71°
43°
28
71°
45°
29
72°
47°
30
72°
45°
31
73°
44°
1
72°
45°
2
72°
46°
3
77°
41°
4
72°
40°
5
70°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Old Mammoth
Old Mammoth's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 40° and 54°. The average high for August is 76° with an average low of 49°. 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 Old Mammoth. See also: September | October | November.
