S
M
T
W
T
F
S
26
63°
51°
27
66°
51°
28
71°
46°
29
74°
48°
30
71°
53°
1
71°
55°
2
67°
55°
3
66°
54°
4
66°
48°
5
63°
54°
6
73°
55°
7
70°
55°
8
68°
54°
9
72°
52°
10
73°
54°
11
83°
53°
12
69°
55°
13
71°
54°
14
77°
51°
15
77°
52°
16
72°
54°
17
76°
51°
18
82°
62°
19
87°
53°
20
87°
57°
21
85°
55°
22
79°
51°
23
78°
55°
24
75°
53°
25
74°
52°
26
70°
51°
27
79°
55°
28
77°
54°
29
77°
51°
30
75°
50°
31
76°
51°
1
83°
54°
2
83°
54°
3
82°
55°
4
81°
56°
5
79°
53°
6
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Campbell
Campbell's May 2026 forecast shows daily high temperatures ranging from 70° to 83°, with overnight lows between 50° and 56°. The average high for May is 78° with an average low of 53°. 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 Campbell. See also: June | July | August.