S
M
T
W
T
F
S
30
93°
67°
31
98°
69°
1
100°
70°
2
99°
67°
3
93°
65°
4
92°
63°
5
92°
64°
6
93°
64°
7
92°
65°
8
92°
64°
9
93°
64°
10
91°
62°
11
91°
61°
12
92°
61°
13
91°
64°
14
91°
59°
15
90°
59°
16
92°
61°
17
93°
63°
18
96°
62°
19
95°
61°
20
95°
61°
21
94°
62°
22
94°
60°
23
93°
60°
24
92°
59°
25
90°
59°
26
90°
58°
27
93°
56°
28
91°
57°
29
88°
56°
30
85°
54°
1
87°
52°
2
85°
52°
3
87°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Catalina
Catalina's September 2026 forecast shows daily high temperatures ranging from 85° to 100°, with overnight lows between 51° and 70°. 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 Catalina. See also: October | November | December.
