S
M
T
W
T
F
S
30
64°
57°
31
63°
55°
1
64°
55°
2
64°
57°
3
63°
57°
4
63°
55°
5
63°
54°
6
68°
55°
7
61°
57°
8
61°
54°
9
61°
54°
10
63°
55°
11
61°
54°
12
66°
55°
13
63°
52°
14
64°
59°
15
64°
57°
16
59°
55°
17
59°
55°
18
62°
55°
19
60°
53°
20
61°
53°
21
64°
58°
22
62°
52°
23
59°
49°
24
59°
55°
25
60°
52°
26
61°
51°
27
60°
51°
28
60°
52°
29
61°
50°
30
62°
51°
1
60°
50°
2
60°
45°
3
55°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kilwinning
Kilwinning's September 2026 forecast shows daily high temperatures ranging from 55° to 64°, with overnight lows between 45° and 58°. The average high for September is 60° with an average low of 51°. 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 Kilwinning. See also: October | November | December.
