S
M
T
W
T
F
S
30
87°
69°
31
92°
69°
1
95°
72°
2
95°
75°
3
98°
74°
4
99°
73°
5
90°
72°
6
85°
66°
7
85°
63°
8
85°
59°
9
86°
58°
10
94°
70°
11
91°
73°
12
87°
74°
13
86°
69°
14
87°
64°
15
81°
64°
16
81°
64°
17
83°
66°
18
82°
69°
19
77°
65°
20
74°
60°
21
71°
61°
22
75°
61°
23
74°
59°
24
75°
60°
25
75°
61°
26
73°
60°
27
76°
63°
28
80°
63°
29
77°
62°
30
79°
63°
1
78°
63°
2
78°
62°
3
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Suffolk
Suffolk's September 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 59° and 74°. The average high for September is 79° with an average low of 64°. 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 Suffolk. See also: October | November | December.
