Koloa Weather in May
May in Koloa brings high temperatures, with highs of 26°C (79°F) and nights dropping to 22°C (72°F). With perfect weather conditions overall, it's a good time to visit.
Rainfall in Koloa in May
Rain is expected on roughly 16 days, totalling around 49 mm (1.9 in) for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Koloa in May
Koloa in May has perfect weather. Days reach 26°C (79°F) and nights cool to 22°C (72°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 22°C (72°F), the nights are warm and generally comfortable.
Sunshine in Koloa in May
With approximately 246 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Wind Speed in Koloa in May
Wind speeds average 5 m/s (10 knots) during May. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.
Average water temperature in May
At 25°C (77°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.For additional travel inspiration, our weather planner can help you discover destinations worldwide.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
Koloa Temperature in May
Min Temperature
22°C (72°F)
Max Temperature
26°C (79°F)
Water Temperature
25°C (77°F) *
Chance of Rain
53%
Precipitation
49 mm (1.9 in)
Rainy days
16 days
Humidity
75% *
Windspeed
5 m/s (10 knots) *
Sunshine
246 hours *
Percentage Sunshine
59% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koloa typically stay consistent throughout May, with daily highs averaging around 26°C (79°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Koloa in May
Browse day-by-day weather records for Koloa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koloa historical weather extremes in May
The extremes listed below come from historical weather data collected in Koloa from 1976 through 2026.
- The hottest May day on record in Koloa reached 31°C (88°F) (May 10, 1981).
- The coldest May day was on May 11, 1997, with a maximum of 22°C (72°F).
- The lowest overnight temperature recorded in May was 15°C (59°F) (May 1, 1996).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Koloa in May
Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Koloa in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Koloa climate overview or explore weather in the United States of America.
