S
M
T
W
T
F
S
30
89°
77°
31
91°
77°
1
90°
76°
2
90°
77°
3
89°
77°
4
89°
78°
5
88°
77°
6
88°
77°
7
89°
76°
8
89°
76°
9
91°
75°
10
91°
76°
11
90°
75°
12
89°
76°
13
89°
76°
14
88°
77°
15
90°
76°
16
88°
77°
17
89°
76°
18
88°
75°
19
90°
75°
20
87°
76°
21
88°
77°
22
87°
76°
23
87°
76°
24
86°
75°
25
86°
75°
26
85°
76°
27
85°
76°
28
86°
75°
29
85°
75°
30
85°
76°
1
86°
74°
2
87°
73°
3
86°
76°
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 85° to 91°, with overnight lows between 73° and 78°. The average high for September is 88° with an average low of 76°. 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.
