S
M
T
W
T
F
S
26
70°
34°
27
68°
48°
28
61°
34°
29
55°
37°
30
54°
34°
1
54°
32°
2
64°
30°
3
72°
48°
4
70°
45°
5
54°
39°
6
46°
32°
7
57°
30°
8
72°
32°
9
63°
41°
10
63°
34°
11
64°
32°
12
77°
50°
13
68°
46°
14
77°
39°
15
88°
57°
16
82°
54°
17
61°
54°
18
77°
55°
19
70°
48°
20
61°
41°
21
61°
46°
22
66°
50°
23
73°
54°
24
82°
45°
25
86°
63°
26
86°
62°
27
85°
56°
28
79°
55°
29
84°
57°
30
81°
54°
31
80°
55°
1
84°
59°
2
86°
61°
3
83°
56°
4
82°
59°
5
85°
61°
6
86°
60°
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 79° to 86°, with overnight lows between 54° and 62°. The average high for May is 83° with an average low of 58°. 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.