S
M
T
W
T
F
S
30
92°
77°
31
89°
75°
1
95°
73°
2
90°
70°
3
89°
69°
4
89°
73°
5
89°
70°
6
N/A
7
93°
63°
8
92°
62°
9
90°
65°
10
91°
67°
11
86°
67°
12
86°
66°
13
84°
69°
14
83°
67°
15
84°
68°
16
82°
65°
17
82°
66°
18
84°
67°
19
83°
67°
20
82°
68°
21
82°
67°
22
81°
66°
23
81°
66°
24
80°
65°
25
80°
63°
26
79°
66°
27
80°
66°
28
80°
65°
29
79°
64°
30
79°
64°
1
80°
65°
2
79°
63°
3
79°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Castelvetrano
Castelvetrano's September 2026 forecast shows daily high temperatures ranging from 79° to 93°, with overnight lows between 62° and 69°. The average high for September is 83° with an average low of 66°. 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 Castelvetrano. See also: October | November | December.
