S
M
T
W
T
F
S
26
53°
41°
27
49°
37°
28
55°
34°
29
59°
35°
30
60°
34°
1
64°
46°
2
71°
41°
3
74°
47°
4
72°
51°
5
58°
43°
6
59°
43°
7
75°
44°
8
76°
49°
9
73°
49°
10
78°
45°
11
87°
54°
12
89°
62°
13
83°
62°
14
74°
52°
15
79°
50°
16
71°
48°
17
59°
36°
18
49°
34°
19
60°
35°
20
67°
41°
21
70°
46°
22
71°
42°
23
80°
52°
24
83°
54°
25
81°
56°
26
75°
57°
27
81°
61°
28
79°
54°
29
72°
47°
30
65°
46°
31
62°
44°
1
71°
48°
2
71°
48°
3
73°
56°
4
77°
48°
5
79°
49°
6
82°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mammoth
Mammoth's May 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 44° and 56°. The average high for May is 74° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Mammoth. See also: June | July | August.