UV Index in San Francisco, Philippines

Last updated: May 3, 2025

Understanding the UV Index is crucial for the residents of San Francisco, Philippines to safeguard their skin health. As exposure to ultraviolet radiation can lead to sunburn and long-term skin damage, being aware of the daily UV levels empowers you to take proactive measures. Typical climatic conditions in this tropical region can lead to high UV exposure, especially between 10:00 AM and 2:00 PM, when the indexes peak at 14. By staying informed about the UV Index, you can enjoy the beautiful sunny days in San Francisco while protecting yourself from harmful effects of the sun.

Hourly UV Index in San Francisco

The UV Index throughout the day paints a vivid picture of sun intensity and potential exposure risks. At 7:00 AM, it starts at a mild 2, making it safe for early outdoor activities. However, by 9:00 AM, it ramps up to 8, signaling increased caution. The peak hits at 11:00 AM and 12:00 PM, both soaring to 14, indicating high UV levels that demand protective measures. As the afternoon progresses, the index gradually declines—down to 5 by 3:00 PM and falling to a comfortable 1 by 5:00 PM. Surprisingly, by 7:00 PM, it drops to 0, giving way to safer evening outdoor conditions. Those planning to bask in the sun should be vigilant between 10:00 AM and 2:00 PM, when the sun's rays are at their fiercest!

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	8	very high	15 min
10:00	11	extreme	10 min
11:00	14	extreme	10 min
12:00	14	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	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in San Francisco

The UV Index values exhibit a consistent extreme exposure category throughout the year, with notably high levels from January to August, peaking at 15 in March, April, and August. Residents and visitors should be particularly cautious during the high-risk months of March, April, and August, as the elevated UV Index poses a significant risk of harm to unprotected skin in just 10 minutes. Regardless of the month, it is vital to wear protective clothing, apply sunscreen liberally, and seek shade as much as possible. Always remain vigilant about UV exposure to ensure a safe and enjoyable experience outdoors.

Monthly Maximum UV Index for San Francisco, Philippines

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

The table above highlights how UV exposure in San Francisco 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 Francisco'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 Francisco	11	13	15	15	13	14	14	15	14	13	11	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