S
M
T
W
T
F
S
30
90°
76°
31
89°
76°
1
91°
76°
2
90°
75°
3
90°
78°
4
90°
79°
5
89°
77°
6
90°
77°
7
91°
76°
8
91°
77°
9
91°
78°
10
89°
77°
11
92°
76°
12
91°
78°
13
92°
77°
14
91°
76°
15
89°
78°
16
90°
78°
17
87°
78°
18
86°
78°
19
86°
77°
20
87°
78°
21
86°
78°
22
85°
77°
23
85°
78°
24
86°
78°
25
85°
77°
26
85°
78°
27
86°
78°
28
86°
77°
29
84°
78°
30
85°
78°
1
84°
77°
2
85°
77°
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 84° to 92°, with overnight lows between 76° and 79°. The average high for September is 88° with an average low of 77°. 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.
