Koloa (HI) Temperature by Month
Koloa, Hawaii, United States of America has a consistently comfortable climate year-round, with daytime highs averaging 26°C (79°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Koloa Monthly Temperatures
In Koloa temperatures are generally consistent throughout the year. Maximum daytime temperatures range from a comfortable 24°C (75°F) in February to a comfortable 28°C (82°F) in September. Nighttime lows range from 24°C (75°F) in September to 20°C (68°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Koloa by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. September, the city's warmest month, gets 242 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Koloa Temperatures: 1976-2026
Browse day-by-day temperature records for Koloa spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Koloa vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Koloa vs World: Temperature Compared
Koloa's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Koloa?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Koloa, February is the coolest month, with average highs of 24°C (75°F) and humidity around 75% — considered high. In September, the warmest month, temperatures average 28°C (82°F) with 74% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Koloa's weather — including monthly rainfall, sunshine hours, and humidity — visit our Koloa climate page.
