Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
May verdict
Koloa, Hawaii, United States in May
Weather score70Good
Good for holiday weather
Average highs sit around 27°C, giving warm days by monthly-average standards. Sunshine averages 7.8h per day, enough for a balanced month. Rainfall averages 155mm, so some wet days are possible.
May weather
Monthly averages
Temp
27°C
Rain
155mm
Sun
7.8h
Sea
25°C
Weather score
70
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 155mm, so some wet days are possible.
Some sun
Sunshine averages 7.8h per day, enough for a balanced month.
Swimmable
Sea temperatures average 25°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Koloa, Hawaii, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May27°C average high
May is close to Koloa's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to October
This stretch sets the upper range for average daytime heat.
Rain
May155mm average rain
May sits near Koloa's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJune to July and September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May7.8 hours average sun
May is brighter than Koloa's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May25°C average sea
May is close to Koloa's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJune to November
Sea temperatures are usually near 26°C in this stretch, so swimming comfort is at its strongest.
Weather score
May70 weather score
May scores above Koloa's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsMay to October
These months have the strongest weather score in the monthly averages.
