S
M
T
W
T
F
S
30
70°
57°
31
69°
58°
1
68°
57°
2
68°
57°
3
67°
55°
4
66°
52°
5
63°
55°
6
66°
57°
7
67°
53°
8
65°
55°
9
66°
56°
10
67°
52°
11
66°
52°
12
65°
53°
13
66°
51°
14
64°
55°
15
65°
51°
16
62°
50°
17
61°
49°
18
61°
53°
19
63°
53°
20
62°
52°
21
60°
49°
22
61°
50°
23
62°
52°
24
61°
51°
25
61°
51°
26
62°
52°
27
63°
53°
28
Hist. Avg.
61°
49°
29
Hist. Avg.
61°
49°
30
Hist. Avg.
61°
49°
1
Hist. Avg.
60°
49°
2
Hist. Avg.
60°
49°
3
Hist. Avg.
60°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lynmouth
Lynmouth's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 49° and 58°. The average high for September is 64° with an average low of 53°. 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 Lynmouth. See also: October | November | December.
