S
M
T
W
T
F
S
30
72°
59°
31
70°
55°
1
72°
52°
2
66°
57°
3
79°
64°
4
68°
57°
5
70°
54°
6
79°
52°
7
72°
59°
8
64°
54°
9
64°
52°
10
68°
50°
11
70°
55°
12
73°
50°
13
72°
63°
14
73°
59°
15
72°
55°
16
66°
52°
17
66°
52°
18
66°
52°
19
72°
59°
20
66°
50°
21
72°
48°
22
77°
55°
23
68°
50°
24
66°
46°
25
68°
52°
26
68°
46°
27
70°
48°
28
64°
48°
29
75°
54°
30
75°
57°
1
68°
48°
2
70°
48°
3
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Northampton
Northampton's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Northampton. See also: October | November | December.
