S
M
T
W
T
F
S
26
63°
43°
27
72°
40°
28
74°
50°
29
56°
46°
30
52°
34°
1
44°
34°
2
44°
34°
3
61°
31°
4
72°
48°
5
70°
49°
6
56°
40°
7
59°
34°
8
58°
38°
9
68°
48°
10
61°
39°
11
61°
34°
12
68°
54°
13
65°
44°
14
55°
42°
15
67°
51°
16
77°
60°
17
80°
61°
18
84°
64°
19
79°
57°
20
69°
49°
21
70°
56°
22
75°
55°
23
74°
56°
24
75°
58°
25
74°
49°
26
77°
56°
27
78°
56°
28
78°
55°
29
77°
57°
30
78°
56°
31
78°
55°
1
70°
51°
2
69°
49°
3
71°
56°
4
79°
57°
5
74°
56°
6
74°
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 55° to 84°, with overnight lows between 42° and 64°. The average high for May is 74° with an average low of 54°. 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.