S
M
T
W
T
F
S
26
87°
66°
27
84°
67°
28
86°
66°
29
88°
63°
30
90°
70°
1
91°
70°
2
87°
65°
3
81°
65°
4
83°
64°
5
87°
68°
6
92°
70°
7
93°
69°
8
88°
68°
9
87°
68°
10
89°
67°
11
87°
68°
12
87°
67°
13
90°
69°
14
88°
68°
15
89°
72°
16
84°
68°
17
85°
67°
18
87°
68°
19
89°
69°
20
89°
69°
21
86°
68°
22
84°
67°
23
84°
65°
24
85°
68°
25
85°
70°
26
86°
71°
27
85°
70°
28
85°
70°
29
86°
71°
30
86°
70°
31
85°
71°
1
85°
71°
2
86°
72°
3
86°
72°
4
87°
71°
5
86°
71°
6
86°
72°
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 81° to 93°, with overnight lows between 64° and 72°. The average high for May is 87° with an average low of 69°. 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.