S
M
T
W
T
F
S
26
87°
75°
27
92°
73°
28
94°
77°
29
95°
75°
30
89°
75°
1
76°
60°
2
78°
57°
3
83°
53°
4
85°
57°
5
94°
69°
6
89°
76°
7
75°
69°
8
89°
66°
9
92°
70°
10
92°
67°
11
84°
66°
12
89°
64°
13
90°
62°
14
92°
61°
15
93°
69°
16
91°
66°
17
91°
77°
18
92°
78°
19
89°
70°
20
87°
66°
21
83°
68°
22
89°
71°
23
83°
69°
24
88°
72°
25
89°
68°
26
88°
69°
27
78°
66°
28
88°
68°
29
90°
69°
30
92°
70°
31
91°
74°
1
93°
75°
2
93°
76°
3
88°
73°
4
89°
73°
5
86°
73°
6
93°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Diego
San Diego's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 San Diego. See also: June | July | August.
