S
M
T
W
T
F
S
30
73°
61°
31
72°
54°
1
72°
50°
2
68°
62°
3
75°
62°
4
68°
51°
5
70°
52°
6
78°
58°
7
72°
55°
8
66°
51°
9
67°
48°
10
65°
48°
11
64°
47°
12
65°
48°
13
65°
49°
14
68°
52°
15
69°
50°
16
64°
46°
17
65°
50°
18
66°
47°
19
67°
50°
20
68°
51°
21
68°
51°
22
67°
50°
23
68°
50°
24
66°
49°
25
67°
51°
26
67°
50°
27
66°
48°
28
66°
49°
29
65°
50°
30
66°
49°
1
60°
44°
2
59°
44°
3
60°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in King's Lynn
King's Lynn's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 43° and 62°. The average high for September is 67° with an average low of 50°. 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 King's Lynn. See also: October | November | December.
