Koloa (HI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Koloa.
Climate overview of Koloa
Koloa, Hawaii, United States of America, enjoys a steady climate throughout the year, with daytime temperatures typically around 26°C (79°F). September is the warmest month at 28°C (82°F), while February is the coolest at 24°C (75°F).
The city receives around 693 mm (27 in) of rainfall per year. December is the wettest month and July the driest. The most sunshine falls in August, with an average of 8.8 hours of daily sunshine.
Koloa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Koloa - and find the best time to visit.
Monthly Temperature in Koloa
The temperature in Koloa remains steady throughout the year, providing a consistently comfortable climate. On average, daytime temperatures range from a comfortable 28°C (82°F) in September to a comfortable 24°C (75°F) in February.
Nighttime temperatures range from 24°C (75°F) in September to 20°C (68°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Koloa
Generally, Koloa has a moderate amount of precipitation, averaging 693 mm (27 in) of rainfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, December, sees around 83 mm (3.3 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, July, still receives a respectable 42 mm (1.7 in) of rainfall. For more details, please visit our Koloa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Koloa
Koloa enjoys sunny spells year-round. August sees up to 8.8 hours of daily sunshine, perfect for a sunny trip. December, the least sunny month, still offers a generous 5.4 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Koloa
The mean water temperature over the year ranges from 24°C (75°F) in January to 27°C (81°F) in August.
Water temperature over the year
Humidity in Koloa by Month
The relative humidity is high throughout the year in Koloa.
The city experiences its highest humidity in November, reaching 77%. In June, the humidity drops to its lowest level at 74%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Koloa
The average wind speed over the year ranges from 4 m/s (8 knots) to 5 m/s (10 knots). It is lower in January, February, September, October and December and higher in March, April, May, June, July, August and November. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Koloa
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Warmest weather: June, July, August, September and October
- Most sunshine: July and August
- Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
Frequently asked questions about the climate in Koloa
What temperatures can I expect in Koloa?
Daytime highs range from 24°C (75°F) in February to 28°C (82°F) in September. Nighttime lows range from 20°C (68°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Koloa get?
Annual rainfall is around 693 mm (27 in). December is the wettest month with 83 mm (3.3 in), while July is the driest with 42 mm (1.7 in).
How sunny is Koloa?
Koloa receives around 2,562 hours of sunshine per year. August is the sunniest month with 263 hours, while December is the cloudiest with just 161 hours. Overall, Koloa enjoys abundant sunshine.
Koloa 3-Day Forecast
Koloa (HI) 3-Day Forecast
Koloa on the map
Koloa is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.