S
M
T
W
T
F
S
26
87°
64°
27
81°
60°
28
85°
56°
29
93°
66°
30
89°
69°
1
81°
61°
2
66°
53°
3
77°
46°
4
83°
50°
5
87°
56°
6
91°
60°
7
80°
69°
8
79°
64°
9
71°
64°
10
87°
66°
11
90°
66°
12
77°
61°
13
82°
60°
14
86°
62°
15
84°
56°
16
90°
62°
17
92°
68°
18
90°
66°
19
91°
66°
20
90°
66°
21
94°
68°
22
91°
68°
23
90°
72°
24
90°
69°
25
90°
70°
26
91°
73°
27
89°
71°
28
80°
70°
29
85°
71°
30
85°
71°
31
81°
69°
1
81°
66°
2
81°
64°
3
82°
65°
4
79°
66°
5
83°
65°
6
86°
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 79° to 89°, with overnight lows between 64° and 71°. The average high for May is 83° with an average low of 68°. 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.