S
M
T
W
T
F
S
26
78°
57°
27
84°
63°
28
80°
66°
29
78°
60°
30
80°
55°
31
85°
54°
1
79°
64°
2
82°
66°
3
77°
54°
4
84°
50°
5
86°
61°
6
84°
69°
7
83°
68°
8
84°
67°
9
84°
65°
10
81°
67°
11
75°
65°
12
75°
65°
13
79°
65°
14
82°
63°
15
82°
58°
16
85°
70°
17
81°
58°
18
83°
61°
19
79°
61°
20
78°
55°
21
76°
56°
22
77°
57°
23
75°
55°
24
76°
54°
25
75°
54°
26
80°
57°
27
78°
60°
28
77°
61°
29
80°
54°
30
78°
59°
31
74°
53°
1
74°
56°
2
75°
58°
3
73°
57°
4
73°
55°
5
74°
55°
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 73° to 85°, with overnight lows between 53° and 70°. The average high for August is 77° with an average low of 57°. 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.