S
M
T
W
T
F
S
30
92°
71°
31
94°
70°
1
95°
69°
2
97°
71°
3
98°
72°
4
97°
72°
5
99°
70°
6
98°
73°
7
93°
71°
8
91°
72°
9
94°
68°
10
94°
67°
11
93°
73°
12
85°
68°
13
92°
66°
14
94°
68°
15
95°
75°
16
93°
73°
17
92°
73°
18
88°
69°
19
82°
64°
20
83°
64°
21
82°
63°
22
85°
63°
23
85°
66°
24
83°
61°
25
86°
66°
26
85°
65°
27
85°
65°
28
84°
64°
29
86°
66°
30
84°
65°
1
80°
64°
2
81°
63°
3
83°
64°
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 80° to 95°, with overnight lows between 61° and 75°. The average high for September is 86° with an average low of 66°. 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.
