S
M
T
W
T
F
S
26
34°
26°
27
42°
26°
28
48°
24°
29
50°
27°
30
56°
23°
1
67°
24°
2
69°
28°
3
70°
30°
4
58°
36°
5
48°
25°
6
65°
22°
7
66°
36°
8
69°
30°
9
64°
34°
10
77°
30°
11
74°
41°
12
80°
30°
13
81°
45°
14
61°
42°
15
58°
37°
16
43°
32°
17
43°
25°
18
46°
27°
19
53°
19°
20
56°
27°
21
53°
34°
22
61°
27°
23
69°
34°
24
76°
34°
25
77°
35°
26
73°
46°
27
78°
42°
28
84°
46°
29
81°
42°
30
54°
42°
31
55°
35°
1
58°
37°
2
65°
40°
3
72°
46°
4
70°
42°
5
79°
46°
6
80°
41°
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 54° to 80°, with overnight lows between 35° and 46°. The average high for May is 67° with an average low of 41°. 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.