S
M
T
W
T
F
S
30
79°
56°
31
76°
61°
1
76°
61°
2
70°
64°
3
78°
60°
4
78°
56°
5
74°
55°
6
71°
54°
7
75°
54°
8
73°
53°
9
75°
59°
10
77°
55°
11
78°
51°
12
72°
49°
13
73°
48°
14
76°
49°
15
70°
49°
16
70°
53°
17
73°
47°
18
68°
45°
19
68°
44°
20
70°
48°
21
73°
52°
22
76°
53°
23
77°
52°
24
76°
50°
25
74°
49°
26
74°
49°
27
75°
50°
28
74°
50°
29
73°
46°
30
65°
42°
1
63°
42°
2
66°
47°
3
71°
48°
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 63° to 78°, with overnight lows between 42° and 64°. The average high for September is 73° with an average low of 51°. 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.
