S
M
T
W
T
F
S
30
77°
55°
31
73°
57°
1
75°
62°
2
78°
59°
3
80°
58°
4
75°
59°
5
79°
54°
6
79°
56°
7
88°
54°
8
92°
59°
9
97°
68°
10
96°
64°
11
81°
61°
12
79°
60°
13
75°
59°
14
85°
55°
15
79°
55°
16
74°
58°
17
77°
55°
18
81°
56°
19
84°
56°
20
76°
56°
21
77°
56°
22
80°
55°
23
87°
56°
24
85°
57°
25
84°
56°
26
81°
58°
27
82°
56°
28
81°
54°
29
81°
55°
30
80°
53°
1
81°
55°
2
75°
55°
3
81°
52°
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 75° to 87°, with overnight lows between 52° and 58°. The average high for September is 81° with an average low of 55°. 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.
