S
M
T
W
T
F
S
31
86°
73°
1
85°
72°
2
85°
78°
3
85°
74°
4
86°
77°
5
85°
75°
6
85°
74°
7
85°
71°
8
83°
73°
9
85°
73°
10
83°
73°
11
86°
77°
12
86°
77°
13
86°
78°
14
86°
77°
15
86°
77°
16
86°
77°
17
86°
76°
18
86°
76°
19
87°
78°
20
87°
75°
21
86°
77°
22
86°
77°
23
86°
77°
24
86°
73°
25
80°
72°
26
83°
72°
27
84°
70°
28
85°
78°
29
84°
74°
30
84°
77°
1
84°
75°
2
84°
72°
3
84°
73°
4
85°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Koloa
Koloa's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Koloa. See also: October | November | December.
