S
M
T
W
T
F
S
30
86°
61°
31
86°
60°
1
85°
61°
2
85°
62°
3
86°
62°
4
86°
60°
5
84°
57°
6
82°
55°
7
78°
57°
8
80°
58°
9
83°
59°
10
84°
61°
11
84°
60°
12
83°
57°
13
83°
57°
14
82°
59°
15
81°
56°
16
78°
55°
17
79°
55°
18
82°
59°
19
83°
60°
20
83°
57°
21
80°
58°
22
77°
59°
23
76°
55°
24
77°
57°
25
77°
54°
26
78°
53°
27
76°
53°
28
74°
51°
29
75°
52°
30
75°
54°
1
76°
60°
2
80°
59°
3
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Santa Clara
Santa Clara's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 51° and 62°. The average high for September is 81° with an average low of 57°. 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 Santa Clara. See also: October | November | December.
