Kailua Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kailua.
Climate overview of Kailua
The climate in Kailua, United States of America, is remarkably consistent, with temperatures year-round averaging 26°C (79°F). The warmest month is September at 28°C (82°F), and the coolest is February at 25°C (77°F).
With around 513 mm (20 in) of annual rainfall, the city has moderate precipitation levels. December is the wettest month and July the driest. It also has a distinct dry season from April to September. The most sunshine falls in July, with an average of 10.2 hours of daily sunshine.
Kailua Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kailua — and find the best time to visit.
Monthly Temperature in Kailua
In Kailua temperatures are generally consistent throughout the year. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in September to a comfortable 25°C (77°F) in the coolest month, February.
Nights vary from 24°C (75°F) in September to around 21°C (70°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kailua
On average, Kailua receives a reasonable amount of rainfall, with an annual precipitation of 513 mm (20 in). Kailua offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month December (61 mm (2.4 in)) and the driest month July (31 mm (1.2 in)) is not too significant. For more details, please visit our Kailua 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 Kailua
Kailua offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between July (10.2 hours daily) and December (6.6 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Kailua
The mean water temperature over the year ranges from 24°C (75°F) in February to 27°C (81°F) in August.
Water temperature over the year
Humidity in Kailua by Month
The relative humidity is high throughout the year in Kailua.
The city experiences its highest humidity in January, reaching 73%. In June, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Kailua
The average wind speed over the year ranges from 3 m/s (6 knots) to 5 m/s (10 knots). It is lower in January and higher in June, July and August. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Kailua
Frequently asked questions about the climate in Kailua
What is the best time to visit Kailua?
Kailua has a distinct dry season from April to September.
What temperatures can I expect in Kailua?
Daytime highs range from 25°C (77°F) in February to 28°C (82°F) in September. Nighttime lows range from 21°C (70°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Kailua get?
Annual rainfall is around 513 mm (20 in). December is the wettest month with 61 mm (2.4 in), while July is the driest with 31 mm (1.2 in).
How sunny is Kailua?
Kailua receives around 3,036 hours of sunshine per year. July is the sunniest month with 306 hours, while December is the cloudiest with just 199 hours. Overall, Kailua enjoys abundant sunshine.
Kailua 3-Day Forecast
Kailua 3-Day Forecast
Kailua on the map
Kailua is highlighted — select any city to see its climate.
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