S
M
T
W
T
F
S
30
88°
75°
31
89°
75°
1
88°
74°
2
88°
75°
3
89°
75°
4
89°
74°
5
90°
74°
6
88°
74°
7
89°
73°
8
88°
73°
9
91°
74°
10
89°
72°
11
87°
72°
12
87°
74°
13
88°
73°
14
90°
74°
15
88°
72°
16
88°
72°
17
90°
73°
18
89°
72°
19
90°
72°
20
87°
72°
21
89°
72°
22
89°
74°
23
90°
73°
24
88°
73°
25
88°
74°
26
87°
73°
27
89°
72°
28
88°
73°
29
89°
73°
30
86°
71°
1
87°
72°
2
88°
68°
3
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Northeast
Northeast's September 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 67° and 75°. The average high for September is 88° with an average low of 73°. 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 Northeast. See also: October | November | December.
