S
M
T
W
T
F
S
30
75°
52°
31
75°
52°
1
74°
53°
2
76°
55°
3
75°
53°
4
77°
52°
5
77°
50°
6
76°
52°
7
74°
48°
8
75°
49°
9
73°
56°
10
74°
50°
11
73°
48°
12
73°
49°
13
74°
55°
14
77°
51°
15
78°
55°
16
79°
55°
17
80°
54°
18
79°
54°
19
78°
50°
20
77°
46°
21
69°
51°
22
69°
52°
23
73°
52°
24
75°
53°
25
76°
47°
26
74°
43°
27
70°
45°
28
66°
44°
29
66°
44°
30
65°
44°
1
65°
49°
2
Hist. Avg.
68°
47°
3
Hist. Avg.
67°
46°
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 65° to 80°, with overnight lows between 43° and 56°. The average high for September is 74° with an average low of 50°. 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.
