S
M
T
W
T
F
S
30
86°
80°
31
92°
76°
1
91°
82°
2
91°
82°
3
91°
79°
4
87°
75°
5
85°
77°
6
86°
77°
7
82°
76°
8
84°
76°
9
82°
72°
10
85°
73°
11
87°
73°
12
90°
74°
13
94°
74°
14
93°
75°
15
92°
74°
16
93°
78°
17
92°
78°
18
95°
75°
19
95°
79°
20
93°
78°
21
94°
79°
22
89°
76°
23
90°
75°
24
89°
75°
25
89°
76°
26
90°
76°
27
91°
75°
28
91°
76°
29
90°
76°
30
90°
75°
1
89°
76°
2
88°
76°
3
88°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Santa Catalina Sur
Santa Catalina Sur's September 2026 forecast shows daily high temperatures ranging from 82° to 95°, with overnight lows between 72° and 79°. The average high for September is 90° with an average low of 76°. 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 Catalina Sur. See also: October | November | December.
