UV Index
UV Index
Today's UV index in Kailua, United States 
will be up to 11.1, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-09
UV index at 11.1 in Kailua means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
Kailua's UV index is generally high, often ranging from 7 to 11, especially during late spring and summer months. This means the sun's rays are strong most of the year.
Kailua has warm temperatures year-round with a dry season from April to October and wetter months from November to March. The weather is mostly sunny with occasional rain showers, especially in winter.
Compared to the wider Hawaiian region, Kailua is similar in warmth but usually sunnier and less rainy than areas on the windward side of the island. Neighboring islands have similar tropical climates but may receive more rain depending on location.
See the UV index hour by hour for Kailua, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.