S
M
T
W
T
F
S
30
84°
46°
31
84°
48°
1
86°
51°
2
86°
51°
3
84°
50°
4
78°
50°
5
81°
49°
6
85°
51°
7
87°
48°
8
85°
49°
9
84°
45°
10
83°
41°
11
77°
40°
12
77°
39°
13
76°
38°
14
74°
42°
15
75°
45°
16
77°
44°
17
80°
46°
18
80°
48°
19
75°
45°
20
72°
45°
21
77°
44°
22
82°
44°
23
81°
43°
24
79°
43°
25
80°
42°
26
79°
44°
27
80°
35°
28
73°
37°
29
70°
43°
30
75°
46°
1
79°
45°
2
80°
43°
3
79°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Campbell
Campbell's September 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 32° and 51°. The average high for September is 80° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Campbell. See also: October | November | December.
