S
M
T
W
T
F
S
30
77°
55°
31
73°
57°
1
74°
57°
2
78°
59°
3
77°
59°
4
76°
54°
5
78°
54°
6
78°
58°
7
85°
59°
8
82°
62°
9
85°
63°
10
86°
63°
11
87°
60°
12
83°
60°
13
81°
61°
14
83°
58°
15
81°
60°
16
77°
58°
17
82°
59°
18
80°
58°
19
76°
55°
20
77°
60°
21
77°
58°
22
81°
58°
23
76°
57°
24
74°
54°
25
75°
53°
26
74°
54°
27
73°
53°
28
74°
54°
29
75°
53°
30
74°
56°
1
74°
54°
2
75°
56°
3
80°
59°
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 73° to 87°, with overnight lows between 53° and 63°. The average high for September is 78° 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.
