S
M
T
W
T
F
S
30
92°
64°
31
92°
65°
1
93°
65°
2
94°
64°
3
93°
62°
4
92°
61°
5
91°
61°
6
92°
62°
7
92°
61°
8
93°
63°
9
92°
61°
10
91°
62°
11
91°
61°
12
92°
60°
13
93°
60°
14
96°
62°
15
96°
62°
16
97°
61°
17
96°
63°
18
95°
60°
19
92°
60°
20
90°
59°
21
94°
63°
22
93°
60°
23
92°
55°
24
88°
56°
25
91°
58°
26
85°
55°
27
87°
59°
28
Hist. Avg.
88°
55°
29
Hist. Avg.
87°
55°
30
Hist. Avg.
87°
54°
1
Hist. Avg.
86°
54°
2
Hist. Avg.
86°
54°
3
Hist. Avg.
85°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Santa Clara
Santa Clara's September 2026 forecast shows daily high temperatures ranging from 85° to 97°, with overnight lows between 55° and 65°. The average high for September is 92° with an average low of 61°. 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.
