S
M
T
W
T
F
S
26
66°
52°
27
72°
47°
28
78°
46°
29
83°
50°
30
86°
53°
1
85°
55°
2
77°
51°
3
74°
54°
4
71°
53°
5
74°
55°
6
78°
54°
7
83°
56°
8
84°
57°
9
82°
57°
10
84°
56°
11
86°
58°
12
82°
54°
13
77°
52°
14
78°
53°
15
77°
54°
16
77°
54°
17
79°
52°
18
78°
55°
19
77°
51°
20
80°
54°
21
83°
57°
22
87°
58°
23
88°
60°
24
89°
60°
25
89°
59°
26
88°
58°
27
86°
57°
28
83°
56°
29
82°
55°
30
81°
54°
31
81°
54°
1
82°
55°
2
84°
55°
3
87°
57°
4
88°
59°
5
87°
58°
6
84°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Stockton
Stockton's May 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 50° and 60°. The average high for May is 82° 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 Stockton. See also: June | July | August.