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