S
M
T
W
T
F
S
30
84°
63°
31
91°
67°
1
92°
67°
2
88°
65°
3
87°
66°
4
89°
72°
5
83°
62°
6
83°
59°
7
82°
58°
8
79°
62°
9
84°
55°
10
79°
48°
11
83°
46°
12
78°
48°
13
71°
42°
14
66°
36°
15
75°
51°
16
75°
45°
17
70°
57°
18
64°
56°
19
64°
58°
20
70°
48°
21
64°
41°
22
61°
37°
23
67°
42°
24
66°
48°
25
70°
45°
26
69°
53°
27
68°
47°
28
69°
48°
29
66°
44°
30
69°
46°
1
69°
49°
2
65°
41°
3
62°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rockland
Rockland's September 2026 forecast shows daily high temperatures ranging from 61° to 70°, with overnight lows between 37° and 53°. The average high for September is 67° with an average low of 45°. 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 Rockland. See also: October | November | December.
