S
M
T
W
T
F
S
26
80°
59°
27
85°
57°
28
64°
48°
29
64°
45°
30
66°
40°
1
64°
44°
2
63°
40°
3
80°
60°
4
81°
57°
5
61°
44°
6
56°
41°
7
64°
49°
8
73°
51°
9
77°
57°
10
72°
53°
11
73°
55°
12
74°
52°
13
77°
57°
14
78°
56°
15
76°
58°
16
78°
55°
17
75°
60°
18
78°
61°
19
78°
57°
20
73°
57°
21
76°
53°
22
71°
53°
23
72°
55°
24
70°
56°
25
71°
55°
26
72°
55°
27
74°
56°
28
74°
60°
29
75°
62°
30
77°
65°
31
76°
62°
1
76°
58°
2
77°
59°
3
77°
66°
4
79°
67°
5
79°
67°
6
80°
68°
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 56° to 81°, with overnight lows between 41° and 68°. The average high for May is 74° with an average low of 57°. 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.