S
M
T
W
T
F
S
30
66°
54°
31
63°
52°
1
62°
51°
2
61°
51°
3
61°
49°
4
62°
51°
5
61°
53°
6
64°
54°
7
64°
53°
8
63°
53°
9
64°
52°
10
65°
53°
11
62°
52°
12
59°
51°
13
60°
52°
14
61°
49°
15
60°
50°
16
61°
51°
17
61°
47°
18
62°
47°
19
59°
48°
20
58°
47°
21
58°
49°
22
59°
52°
23
62°
50°
24
63°
48°
25
58°
45°
26
60°
45°
27
59°
47°
28
57°
46°
29
59°
47°
30
60°
45°
1
56°
44°
2
56°
43°
3
57°
46°
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 56° to 66°, with overnight lows between 43° and 54°. The average high for September is 61° with an average low of 49°. 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.
