UV Index in Siayan, Philippines

Last updated: June 2, 2025

In Siayan, Philippines, understanding the UV Index is crucial for maintaining optimal skin health and preventing painful sunburns. With a tropical climate characterized by intense sunlight, Siayan residents and visitors alike face varying UV levels that can peak significantly throughout the day. Notably, the UV Index can soar to 13 around midday, indicating very high exposure levels. By staying informed about UV risks, you can take proactive steps to protect yourself from harmful solar radiation and enjoy the beautiful Siayan outdoors safely.

Hourly UV Index in Siayan

As the sun rises, the UV Index begins its climb, peaking at 13 by noon, a clear signal that midday is when UV rays are most potent. Starting from a gentle 2 at 07:00, it steadily rises to 4 by 08:00, and then rapidly escalates, hitting 10 by 10:00. Midday, between 11:00 and 12:00, sees the highest intensity, maintaining a scorching 13. A gradual decline follows, with readings dropping to 9 by 14:00, before falling to a safer 5 at 15:00. The late afternoon brings a further decrease, concluding the day with 2 at 16:00, followed by a quick drop to 1 by 17:00 and settling at 0 after 18:00. This hourly snapshot serves as a reminder to stay protective during peak hours when UV exposure is highest.

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	10	very high	15 min
11:00	13	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Siayan

Throughout the year, the UV Index in the area remains consistently extreme, peaking between February and March with values reaching up to 16. The high-risk months for UV exposure are primarily from January to April, where the UV Index fluctuates between 13 and 16, indicating severe potential for skin damage within just 10 minutes of unprotected sun exposure. While May to August witness slightly lower UV values (ranging from 14 to 13), caution is still crucial. September marks another peak at 15, gradually decreasing to 12 in November and 11 in December. Visitors and residents are strongly advised to wear protective clothing, use sunscreen, and seek shade during peak sun hours, particularly from late winter to early spring, to minimize the risk of harmful UV exposure.

Monthly Maximum UV Index for Siayan, Philippines

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

The table above highlights how UV exposure in Siayan 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.

Siayan'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
Siayan	13	14	16	16	14	13	13	14	15	14	12	11
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