S
M
T
W
T
F
S
26
83°
63°
27
83°
64°
28
84°
64°
29
83°
63°
30
83°
64°
31
84°
64°
1
87°
69°
2
89°
69°
3
89°
68°
4
88°
68°
5
88°
67°
6
86°
63°
7
82°
62°
8
82°
62°
9
83°
63°
10
83°
63°
11
85°
64°
12
84°
65°
13
87°
67°
14
88°
66°
15
88°
67°
16
87°
67°
17
88°
68°
18
87°
67°
19
87°
65°
20
81°
66°
21
84°
67°
22
84°
67°
23
81°
63°
24
85°
63°
25
85°
66°
26
86°
64°
27
86°
64°
28
84°
67°
29
86°
67°
30
87°
65°
31
86°
65°
1
85°
64°
2
84°
65°
3
83°
64°
4
86°
64°
5
84°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Campbell
Campbell's August 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 62° and 69°. The average high for August is 85° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Campbell. See also: September | October | November.