S
M
T
W
T
F
S
30
82°
63°
31
83°
58°
1
82°
61°
2
82°
63°
3
83°
63°
4
87°
65°
5
86°
60°
6
81°
55°
7
79°
56°
8
77°
55°
9
75°
54°
10
74°
52°
11
73°
49°
12
77°
54°
13
71°
54°
14
77°
54°
15
77°
53°
16
74°
53°
17
75°
54°
18
74°
52°
19
70°
51°
20
75°
52°
21
76°
52°
22
75°
51°
23
74°
53°
24
76°
53°
25
75°
52°
26
74°
52°
27
75°
51°
28
74°
50°
29
73°
49°
30
73°
51°
1
74°
51°
2
73°
49°
3
71°
48°
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 48° and 65°. The average high for September is 76° 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 September weather will actually feel in Campbell. See also: October | November | December.
