S
M
T
W
T
F
S
30
73°
51°
31
72°
49°
1
74°
53°
2
74°
57°
3
73°
60°
4
81°
60°
5
82°
58°
6
81°
51°
7
79°
49°
8
73°
51°
9
72°
49°
10
71°
52°
11
71°
55°
12
70°
50°
13
73°
52°
14
75°
54°
15
75°
53°
16
69°
54°
17
70°
53°
18
73°
52°
19
74°
46°
20
72°
49°
21
71°
46°
22
73°
44°
23
66°
44°
24
66°
45°
25
65°
46°
26
65°
43°
27
66°
43°
28
64°
44°
29
62°
41°
30
63°
41°
1
63°
46°
2
69°
41°
3
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Somersworth
Somersworth's September 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 41° and 60°. The average high for September is 71° with an average low of 49°. 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 Somersworth. See also: October | November | December.
