S
M
T
W
T
F
S
30
85°
55°
31
85°
56°
1
84°
55°
2
85°
55°
3
85°
54°
4
84°
55°
5
85°
50°
6
84°
46°
7
78°
46°
8
78°
48°
9
80°
51°
10
83°
53°
11
84°
50°
12
84°
51°
13
83°
53°
14
83°
51°
15
82°
50°
16
81°
48°
17
80°
52°
18
82°
51°
19
83°
50°
20
82°
48°
21
80°
51°
22
77°
53°
23
76°
48°
24
78°
52°
25
78°
49°
26
80°
46°
27
77°
46°
28
76°
47°
29
77°
46°
30
76°
47°
1
76°
54°
2
82°
53°
3
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sisquoc
Sisquoc's September 2026 forecast shows daily high temperatures ranging from 76° to 85°, with overnight lows between 46° and 56°. The average high for September is 81° with an average low of 51°. 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 Sisquoc. See also: October | November | December.