UV Index in Koror, Palau

Last updated: May 3, 2025

In Koror, Palau, understanding the UV Index is crucial for protecting your skin and overall health under the intense tropical sun. With UV levels soaring to a peak of 15 around noon, awareness can mean the difference between enjoying the outdoors and suffering from painful sunburns. Given Koror's Af climate, characterized by warm temperatures and high humidity, it's essential to stay informed about UV exposure risks throughout the day. Learning to read the UV Index not only helps prevent skin damage but also promotes long-term skin health—empowering you to enjoy the beauty of Palau safely.

Hourly UV Index in Koror

As the sun rises on a new day, the UV Index begins at a modest 1 at 7:00 AM, gradually climbing to reach its peak of 15 by 12:00 PM. The hours between 9:00 AM and 1:00 PM showcase the sun's intensity, highlighted by a significant spike to 11 at 10:00 AM and 14 at 11:00 AM. However, by the afternoon, the radiation starts to wane, dropping to 6 at 3:00 PM, and then tapering off significantly as evening approaches. By 6:00 PM, the UV Index returns to a safe level of 1, and by 7:00 PM, it settles at 0, signaling the end of peak solar radiation for the day. Remember, during those peak hours, it’s essential to protect your skin!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	4	moderate	30 min
09:00	7	high	25 min
10:00	11	extreme	10 min
11:00	14	extreme	10 min
12:00	15	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Koror

Throughout the year, the UV Index in this region remains notably high, consistently falling within the extreme exposure category, with burn times limited to just 10 minutes. The highest UV levels typically occur from February to April, peaking at an index of 16, making these months particularly hazardous for outdoor activities without protection. Although a slight decrease in UV intensity is observed in June and December, caution is still advised year-round due to the enduring extreme conditions. Visitors and residents are strongly recommended to take proactive measures, such as applying sunscreen, wearing protective clothing, and seeking shade to mitigate the risk of harmful skin exposure, especially during the peak months of February through April.

Monthly Maximum UV Index for Koror, Palau

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Koror. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Koror, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Koror UV Index with Other Palau Cities

The table above highlights how UV exposure in Koror compares to other major locations across Palau. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Koror's solar exposure compared to other cities in Palau. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mengellang UVI	13	14	16	17	15	13	14	15	15	14	13	12
Ulimang UVI	13	14	16	17	15	13	14	15	15	14	13	12
Koror	13	15	16	16	15	13	14	15	15	14	13	12
Kloulklubed UVI	13	15	16	16	15	13	14	15	15	14	13	12
Koror Town UVI	13	15	16	16	15	13	14	15	15	14	13	12