S
M
T
W
T
F
S
30
72°
57°
31
72°
54°
1
70°
61°
2
68°
64°
3
70°
65°
4
69°
58°
5
67°
61°
6
69°
62°
7
66°
61°
8
65°
57°
9
66°
54°
10
64°
53°
11
68°
56°
12
67°
55°
13
68°
56°
14
66°
50°
15
65°
53°
16
63°
49°
17
63°
54°
18
64°
55°
19
67°
54°
20
63°
53°
21
66°
54°
22
66°
55°
23
65°
51°
24
63°
48°
25
64°
48°
26
64°
49°
27
65°
52°
28
65°
53°
29
66°
54°
30
65°
53°
1
66°
53°
2
66°
52°
3
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Weymouth
Weymouth's September 2026 forecast shows daily high temperatures ranging from 63° to 70°, with overnight lows between 48° and 65°. The average high for September is 66° with an average low of 55°. 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 Weymouth. See also: October | November | December.
