S
M
T
W
T
F
S
26
48°
38°
27
53°
31°
28
66°
29°
29
70°
33°
30
73°
40°
1
76°
41°
2
80°
46°
3
69°
46°
4
50°
38°
5
48°
38°
6
67°
33°
7
78°
42°
8
81°
45°
9
83°
44°
10
90°
47°
11
87°
48°
12
87°
55°
13
81°
44°
14
75°
44°
15
76°
46°
16
67°
42°
17
60°
40°
18
66°
51°
19
69°
47°
20
74°
52°
21
77°
51°
22
74°
52°
23
73°
54°
24
70°
52°
25
70°
51°
26
65°
50°
27
69°
52°
28
69°
52°
29
68°
51°
30
70°
51°
31
71°
52°
1
77°
50°
2
78°
54°
3
79°
55°
4
79°
55°
5
78°
54°
6
79°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Laguna
Mount Laguna's May 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 47° and 55°. The average high for May is 73° with an average low of 52°. 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 Mount Laguna. See also: June | July | August.