S
M
T
W
T
F
S
30
88°
68°
31
90°
68°
1
87°
71°
2
89°
67°
3
89°
69°
4
93°
68°
5
92°
67°
6
90°
70°
7
91°
72°
8
92°
70°
9
76°
65°
10
77°
61°
11
77°
63°
12
79°
62°
13
79°
64°
14
80°
63°
15
81°
65°
16
75°
60°
17
73°
59°
18
74°
60°
19
68°
51°
20
69°
52°
21
73°
52°
22
74°
53°
23
74°
55°
24
73°
52°
25
74°
54°
26
74°
56°
27
73°
54°
28
73°
55°
29
72°
53°
30
72°
52°
1
69°
49°
2
70°
52°
3
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Castegnato
Castegnato's September 2026 forecast shows daily high temperatures ranging from 68° to 92°, with overnight lows between 48° and 72°. The average high for September is 76° with an average low of 58°. 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 Castegnato. See also: October | November | December.