S
M
T
W
T
F
S
30
80°
59°
31
80°
68°
1
84°
66°
2
72°
65°
3
82°
67°
4
84°
60°
5
78°
57°
6
75°
56°
7
71°
55°
8
72°
53°
9
73°
54°
10
79°
56°
11
74°
54°
12
71°
54°
13
72°
55°
14
71°
52°
15
70°
50°
16
67°
55°
17
69°
48°
18
65°
46°
19
73°
51°
20
73°
52°
21
70°
48°
22
70°
49°
23
66°
53°
24
71°
49°
25
68°
48°
26
70°
52°
27
70°
51°
28
68°
45°
29
61°
42°
30
62°
44°
1
60°
41°
2
60°
45°
3
59°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Suffern
Suffern's September 2026 forecast shows daily high temperatures ranging from 59° to 84°, with overnight lows between 41° and 67°. The average high for September is 70° with an average low of 52°. 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 Suffern. See also: October | November | December.
