S
M
T
W
T
F
S
26
71°
51°
27
70°
53°
28
73°
55°
29
75°
53°
30
76°
56°
1
78°
56°
2
77°
54°
3
70°
52°
4
70°
52°
5
71°
53°
6
71°
52°
7
73°
53°
8
72°
53°
9
73°
54°
10
77°
56°
11
78°
58°
12
79°
58°
13
78°
57°
14
76°
57°
15
74°
55°
16
74°
56°
17
75°
56°
18
76°
56°
19
75°
55°
20
74°
54°
21
73°
55°
22
72°
56°
23
76°
54°
24
72°
52°
25
73°
51°
26
71°
52°
27
72°
55°
28
74°
57°
29
79°
59°
30
80°
57°
31
81°
57°
1
78°
56°
2
78°
57°
3
79°
58°
4
79°
59°
5
80°
60°
6
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jamul
Jamul's May 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 51° and 61°. The average high for May is 75° with an average low of 55°. 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 Jamul. See also: June | July | August.