Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
Weather Guide
Koloa, Hawaii, United States Average Monthly Weather
Weather score64Good annual avg
Best months: June, May, September
Across the year, average daytime temperatures are around 27°C, sunshine averages 7h per day, and rainfall totals about 2004mm. Sea temperatures average 26°C across the year.
Annual weather
Annual averages
Temp
27°C
Rain
2004mm
Annual total
Sun
7h
Sea
26°C
Weather score
64
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 145mm, so some wet days are possible.
Bright
Sunshine averages 8.3h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 26°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
July29°C average high
July sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to October
This stretch sets the upper range for average daytime heat.
Rain
July145mm average rain
July 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
July8.3 hours average sun
July is one of Koloa's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July26°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to November
Sea temperatures are usually near 26°C in this stretch, so swimming comfort is at its strongest.
Weather score
July67 weather score
July 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.
