S
M
T
W
T
F
S
30
95°
51°
31
94°
52°
1
91°
48°
2
90°
49°
3
92°
52°
4
93°
50°
5
88°
49°
6
89°
49°
7
89°
47°
8
88°
47°
9
88°
46°
10
87°
45°
11
88°
45°
12
87°
48°
13
88°
49°
14
90°
48°
15
88°
44°
16
84°
44°
17
84°
45°
18
85°
44°
19
85°
45°
20
86°
44°
21
84°
46°
22
85°
48°
23
86°
49°
24
88°
49°
25
89°
48°
26
89°
50°
27
88°
50°
28
91°
49°
29
91°
50°
30
90°
50°
1
90°
49°
2
89°
49°
3
89°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Santa Ynez
Santa Ynez's September 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 44° and 52°. The average high for September is 89° with an average low of 48°. 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 Ynez. See also: October | November | December.
