S
M
T
W
T
F
S
30
91°
74°
31
91°
73°
1
90°
74°
2
90°
74°
3
89°
75°
4
89°
73°
5
91°
74°
6
91°
74°
7
88°
75°
8
88°
74°
9
89°
75°
10
88°
73°
11
89°
74°
12
88°
73°
13
88°
73°
14
89°
72°
15
90°
74°
16
91°
74°
17
89°
72°
18
88°
71°
19
89°
71°
20
91°
74°
21
90°
73°
22
90°
74°
23
89°
72°
24
89°
72°
25
88°
71°
26
89°
72°
27
86°
71°
28
87°
69°
29
86°
70°
30
86°
69°
1
85°
68°
2
86°
69°
3
87°
70°
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 68° and 75°. The average high for September is 89° with an average low of 72°. 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.
