S
M
T
W
T
F
S
30
84°
59°
31
80°
58°
1
68°
62°
2
72°
62°
3
75°
62°
4
84°
64°
5
73°
60°
6
73°
54°
7
80°
51°
8
79°
56°
9
74°
53°
10
86°
69°
11
77°
52°
12
76°
46°
13
67°
61°
14
72°
50°
15
71°
45°
16
80°
51°
17
78°
63°
18
77°
58°
19
63°
46°
20
62°
45°
21
68°
52°
22
63°
45°
23
63°
43°
24
65°
44°
25
67°
44°
26
61°
54°
27
59°
54°
28
57°
54°
29
65°
54°
30
73°
51°
1
75°
55°
2
75°
52°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Haverhill
Haverhill's September 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 49° and 55°. The average high for September is 67° with an average low of 53°. 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 Haverhill. See also: October | November | December.
