S
M
T
W
T
F
S
30
61°
57°
31
72°
54°
1
68°
52°
2
59°
48°
3
64°
57°
4
66°
55°
5
66°
52°
6
68°
55°
7
63°
52°
8
N/A
9
62°
49°
10
62°
51°
11
63°
51°
12
64°
55°
13
64°
52°
14
68°
57°
15
62°
49°
16
61°
47°
17
61°
49°
18
60°
49°
19
63°
50°
20
62°
48°
21
63°
53°
22
62°
52°
23
62°
51°
24
63°
49°
25
60°
46°
26
59°
45°
27
60°
48°
28
61°
50°
29
59°
49°
30
61°
47°
1
59°
50°
2
61°
50°
3
60°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Longniddry
Longniddry's September 2026 forecast shows daily high temperatures ranging from 59° to 68°, with overnight lows between 45° and 57°. The average high for September is 62° 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 Longniddry. See also: October | November | December.