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
78°
61°
17
76°
65°
18
77°
45°
19
66°
51°
20
64°
48°
21
66°
48°
22
64°
47°
23
67°
50°
24
69°
52°
25
69°
49°
26
68°
48°
27
72°
49°
28
69°
50°
29
68°
46°
30
64°
48°
1
63°
49°
2
71°
49°
3
63°
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 63° to 78°, with overnight lows between 45° and 65°. The average high for September is 69° with an average low of 50°. 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.
