S
M
T
W
T
F
S
26
65°
51°
27
71°
48°
28
77°
44°
29
82°
46°
30
87°
49°
1
90°
51°
2
94°
54°
3
77°
52°
4
70°
57°
5
72°
53°
6
81°
47°
7
89°
53°
8
92°
54°
9
93°
50°
10
96°
56°
11
99°
58°
12
100°
59°
13
86°
52°
14
90°
50°
15
91°
51°
16
85°
53°
17
82°
49°
18
84°
45°
19
89°
50°
20
93°
50°
21
97°
52°
22
97°
56°
23
93°
53°
24
89°
53°
25
87°
54°
26
75°
51°
27
76°
52°
28
71°
52°
29
81°
54°
30
89°
55°
31
93°
61°
1
99°
62°
2
102°
63°
3
102°
64°
4
101°
63°
5
99°
60°
6
93°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Joaquin
San Joaquin's May 2026 forecast shows daily high temperatures ranging from 71° to 102°, with overnight lows between 52° and 64°. The average high for May is 91° with an average low of 59°. 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 Joaquin. See also: June | July | August.
