S
M
T
W
T
F
S
30
75°
60°
31
77°
60°
1
76°
63°
2
74°
64°
3
75°
55°
4
74°
54°
5
75°
52°
6
74°
54°
7
76°
53°
8
76°
55°
9
78°
55°
10
75°
52°
11
75°
46°
12
71°
42°
13
74°
45°
14
72°
45°
15
67°
42°
16
69°
49°
17
74°
45°
18
65°
41°
19
66°
40°
20
70°
45°
21
73°
49°
22
75°
50°
23
75°
48°
24
73°
46°
25
72°
45°
26
72°
46°
27
73°
47°
28
73°
46°
29
71°
41°
30
61°
36°
1
60°
36°
2
64°
45°
3
70°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dorset
Dorset's September 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 36° and 64°. The average high for September is 72° with an average low of 48°. 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 Dorset. See also: October | November | December.
