S
M
T
W
T
F
S
26
78°
51°
27
81°
52°
28
84°
53°
29
83°
53°
30
81°
51°
31
76°
46°
1
78°
47°
2
75°
47°
3
76°
46°
4
77°
51°
5
79°
49°
6
78°
50°
7
79°
53°
8
84°
52°
9
83°
49°
10
83°
49°
11
82°
51°
12
78°
49°
13
74°
47°
14
75°
48°
15
73°
43°
16
76°
47°
17
77°
48°
18
80°
46°
19
77°
42°
20
71°
41°
21
70°
44°
22
73°
43°
23
71°
43°
24
70°
44°
25
72°
42°
26
76°
48°
27
73°
43°
28
68°
40°
29
68°
36°
30
67°
35°
31
67°
39°
1
68°
42°
2
69°
38°
3
68°
37°
4
67°
43°
5
68°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mammoth
Mammoth's August 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 35° and 53°. The average high for August is 75° with an average low of 46°. 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 Mammoth. See also: September | October | November.