S
M
T
W
T
F
S
30
69°
52°
31
79°
41°
1
77°
54°
2
64°
46°
3
64°
48°
4
61°
41°
5
72°
37°
6
73°
43°
7
57°
52°
8
64°
52°
9
73°
46°
10
73°
46°
11
72°
45°
12
73°
46°
13
61°
48°
14
57°
48°
15
64°
48°
16
73°
45°
17
72°
43°
18
73°
43°
19
73°
41°
20
75°
41°
21
79°
47°
22
76°
44°
23
69°
44°
24
69°
47°
25
61°
38°
26
60°
35°
27
61°
35°
28
66°
40°
29
65°
42°
30
66°
42°
1
60°
38°
2
63°
34°
3
62°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coolin
Coolin's September 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 34° and 47°. The average high for September is 66° with an average low of 40°. 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 Coolin. See also: October | November | December.