S
M
T
W
T
F
S
30
72°
57°
31
72°
54°
1
72°
52°
2
68°
59°
3
79°
66°
4
68°
55°
5
70°
52°
6
81°
55°
7
70°
59°
8
64°
55°
9
66°
50°
10
66°
46°
11
72°
48°
12
72°
46°
13
70°
63°
14
72°
63°
15
70°
52°
16
66°
50°
17
68°
54°
18
68°
50°
19
70°
61°
20
68°
52°
21
75°
48°
22
75°
52°
23
72°
48°
24
73°
45°
25
72°
54°
26
68°
45°
27
68°
52°
28
66°
45°
29
73°
55°
30
N/A
1
66°
59°
2
67°
58°
3
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Weymouth
Weymouth's September 2026 forecast shows daily high temperatures ranging from 66° to 68°, with overnight lows between 53° and 59°. The average high for September is 67° with an average low of 57°. 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.
