S
M
T
W
T
F
S
26
54°
40°
27
42°
36°
28
56°
30°
29
62°
31°
30
62°
38°
1
65°
39°
2
76°
42°
3
78°
48°
4
77°
55°
5
67°
48°
6
65°
43°
7
78°
44°
8
77°
54°
9
76°
51°
10
78°
49°
11
90°
53°
12
91°
56°
13
90°
63°
14
84°
46°
15
76°
49°
16
74°
48°
17
67°
40°
18
54°
35°
19
63°
37°
20
72°
40°
21
71°
51°
22
72°
45°
23
84°
50°
24
84°
57°
25
86°
64°
26
81°
53°
27
72°
52°
28
79°
52°
29
69°
49°
30
75°
54°
31
81°
56°
1
84°
55°
2
86°
58°
3
87°
60°
4
83°
59°
5
85°
59°
6
79°
52°
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 69° to 87°, with overnight lows between 49° and 64°. The average high for May is 81° with an average low of 56°. 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.