UV Index in San Juan, Philippines

Last updated: July 2, 2025

Understanding the UV Index in San Juan, Philippines, is essential for protecting your skin and maintaining overall health. With the tropical climate here, residents and visitors are frequently exposed to high levels of ultraviolet radiation, making it crucial to monitor daily UV levels. Awareness of the UV Index helps in effectively preventing sunburn and long-term skin damage, especially during peak hours when the index can soar to 14—a level that poses significant risks. By recognizing the importance of these numbers, you can enjoy the beautiful, sunny days of San Juan while safeguarding your skin against the harsh effects of the sun.

Hourly UV Index in San Juan

As the sun rises, the UV Index starts at a moderate level of 2 at 7 AM, gradually increasing to a peak of 14 by noon. The intensity is most striking at 11 AM and 12 PM, where exposure becomes critical. After this time, the index begins a gradual decline, dropping to 10 at 2 PM and continuing downwards to a mere 1 by 5 PM. Sun-seekers and outdoor enthusiasts should be especially cautious from 9 AM to 1 PM when the UV levels are at their highest, reaching their zenith with an extreme 11 at 10 AM. Remember to protect your skin under this midday sun!

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	2	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	14	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 San Juan

The UV Index exhibits significant seasonal variability, with extreme levels persisting from January to October. The highest indices occur in April and August, both reaching 15, indicating a high risk for harmful UV exposure. March and September follow closely at 14, maintaining consistent 10-minute burn times during these months. December sees a slight decrease to a very high UV Index of 9, allowing for a marginally longer burn time of 15 minutes. Therefore, visitors and residents are strongly advised to take precautionary measures—such as using sunscreen, wearing protective clothing, and seeking shade—especially from January to October, as the risk of skin damage is considerably elevated during this period.

Monthly Maximum UV Index for San Juan, Philippines

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in San Juan. 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 San Juan, 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 San Juan UV Index with Other Philippines Cities

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

San Juan's solar exposure compared to other cities in Philippines. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Caloocan City UVI	11	13	15	15	13	14	13	14	14	13	10	10
Quezon City UVI	11	13	15	15	13	14	13	14	14	13	10	10
Manila UVI	11	13	14	14	13	13	13	14	14	13	10	10
San Juan	11	13	14	15	13	14	14	15	14	13	11	9
Budta UVI	13	15	16	16	14	13	14	14	15	14	13	11
Davao UVI	13	15	16	15	15	13	14	14	15	14	13	11