S
M
T
W
T
F
S
26
67°
46°
27
64°
42°
28
66°
42°
29
69°
46°
30
66°
42°
1
47°
35°
2
60°
42°
3
63°
47°
4
65°
46°
5
60°
40°
6
59°
43°
7
69°
48°
8
69°
52°
9
74°
51°
10
69°
49°
11
74°
51°
12
75°
50°
13
75°
52°
14
74°
47°
15
69°
46°
16
68°
46°
17
69°
45°
18
70°
46°
19
70°
47°
20
71°
48°
21
66°
43°
22
70°
47°
23
73°
49°
24
70°
45°
25
65°
41°
26
65°
40°
27
66°
41°
28
68°
45°
29
74°
48°
30
77°
51°
31
77°
51°
1
69°
50°
2
72°
51°
3
76°
51°
4
78°
49°
5
79°
52°
6
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Los Alamos
Los Alamos's May 2026 forecast shows daily high temperatures ranging from 47° to 79°, with overnight lows between 35° and 52°. The average high for May is 70° with an average low of 47°. 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 Los Alamos. See also: June | July | August.