S
M
T
W
T
F
S
26
60°
41°
27
70°
41°
28
58°
51°
29
53°
40°
30
45°
37°
1
40°
32°
2
42°
31°
3
56°
30°
4
69°
45°
5
65°
48°
6
51°
39°
7
52°
32°
8
55°
36°
9
63°
47°
10
52°
39°
11
54°
34°
12
60°
30°
13
59°
40°
14
43°
39°
15
60°
41°
16
72°
44°
17
79°
62°
18
86°
61°
19
82°
63°
20
65°
46°
21
60°
43°
22
60°
44°
23
56°
45°
24
63°
47°
25
72°
55°
26
79°
58°
27
74°
49°
28
65°
46°
29
66°
45°
30
59°
43°
31
66°
50°
1
67°
51°
2
68°
53°
3
72°
55°
4
71°
57°
5
73°
59°
6
75°
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 59° to 79°, with overnight lows between 43° and 60°. The average high for May is 70° with an average low of 52°. 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.