S
M
T
W
T
F
S
26
81°
71°
27
81°
69°
28
81°
73°
29
81°
71°
30
81°
70°
1
81°
67°
2
81°
69°
3
80°
69°
4
80°
65°
5
80°
65°
6
80°
65°
7
80°
66°
8
82°
70°
9
81°
71°
10
82°
70°
11
81°
66°
12
81°
66°
13
83°
65°
14
82°
71°
15
79°
71°
16
80°
70°
17
79°
71°
18
79°
71°
19
80°
70°
20
79°
71°
21
80°
71°
22
80°
70°
23
81°
71°
24
80°
71°
25
80°
70°
26
81°
69°
27
81°
70°
28
80°
71°
29
80°
72°
30
81°
71°
31
80°
72°
1
80°
72°
2
81°
71°
3
81°
72°
4
82°
71°
5
81°
73°
6
81°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Koloa
Koloa's May 2026 forecast shows daily high temperatures ranging from 79° to 83°, with overnight lows between 65° and 73°. The average high for May is 81° with an average low of 70°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Koloa. See also: June | July | August.
