S
M
T
W
T
F
S
30
80°
61°
31
79°
69°
1
78°
67°
2
74°
65°
3
88°
69°
4
85°
73°
5
80°
68°
6
73°
61°
7
79°
57°
8
80°
61°
9
80°
63°
10
87°
72°
11
79°
62°
12
77°
59°
13
N/A
14
75°
55°
15
71°
56°
16
76°
65°
17
79°
68°
18
80°
62°
19
71°
62°
20
70°
57°
21
68°
59°
22
67°
57°
23
67°
56°
24
68°
56°
25
72°
57°
26
71°
58°
27
66°
60°
28
73°
59°
29
73°
57°
30
66°
54°
1
65°
54°
2
68°
58°
3
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Commack
Commack's September 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 54° and 68°. The average high for September is 71° 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 Commack. See also: October | November | December.
