S
M
T
W
T
F
S
30
64°
54°
31
63°
48°
1
59°
48°
2
61°
55°
3
63°
54°
4
59°
52°
5
59°
46°
6
64°
45°
7
61°
52°
8
57°
46°
9
61°
49°
10
62°
53°
11
62°
51°
12
63°
55°
13
63°
53°
14
65°
55°
15
63°
48°
16
60°
52°
17
61°
50°
18
62°
52°
19
64°
52°
20
62°
51°
21
63°
52°
22
63°
50°
23
63°
48°
24
62°
47°
25
57°
46°
26
57°
46°
27
58°
48°
28
59°
43°
29
55°
42°
30
56°
46°
1
56°
44°
2
58°
47°
3
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cockermouth
Cockermouth's September 2026 forecast shows daily high temperatures ranging from 55° to 65°, with overnight lows between 42° and 55°. The average high for September is 60° 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 Cockermouth. See also: October | November | December.