S
M
T
W
T
F
S
30
81°
47°
31
82°
48°
1
82°
46°
2
80°
45°
3
80°
43°
4
79°
41°
5
77°
37°
6
74°
38°
7
74°
43°
8
77°
46°
9
79°
44°
10
79°
38°
11
74°
43°
12
75°
42°
13
78°
43°
14
77°
44°
15
78°
43°
16
75°
41°
17
65°
38°
18
69°
40°
19
65°
33°
20
72°
42°
21
73°
37°
22
Hist. Avg.
70°
40°
23
Hist. Avg.
69°
39°
24
Hist. Avg.
69°
39°
25
Hist. Avg.
68°
39°
26
Hist. Avg.
68°
38°
27
Hist. Avg.
67°
38°
28
Hist. Avg.
67°
38°
29
Hist. Avg.
66°
37°
30
Hist. Avg.
66°
37°
1
Hist. Avg.
66°
37°
2
Hist. Avg.
65°
37°
3
Hist. Avg.
64°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Coolin
Coolin's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 33° and 48°. The average high for September is 76° with an average low of 42°. 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.