S
M
T
W
T
F
S
26
74°
42°
27
74°
55°
28
64°
49°
29
58°
39°
30
59°
37°
1
55°
37°
2
60°
29°
3
75°
42°
4
82°
42°
5
59°
45°
6
56°
32°
7
65°
30°
8
72°
39°
9
74°
49°
10
68°
37°
11
67°
41°
12
77°
44°
13
69°
42°
14
76°
39°
15
85°
58°
16
85°
61°
17
87°
65°
18
79°
64°
19
72°
51°
20
67°
46°
21
69°
45°
22
72°
50°
23
78°
56°
24
81°
60°
25
86°
55°
26
88°
54°
27
91°
54°
28
87°
57°
29
84°
60°
30
80°
55°
31
82°
58°
1
82°
53°
2
86°
52°
3
88°
59°
4
90°
63°
5
86°
61°
6
83°
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 80° to 90°, with overnight lows between 52° and 63°. The average high for May is 85° 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.