UV Index in San Francisco, Philippines

Last updated: July 2, 2025

In San Francisco, Philippines, being aware of the UV Index is crucial for safeguarding your skin against the harmful effects of ultraviolet radiation. Understanding UV levels not only helps in preventing sunburn but also plays a pivotal role in maintaining overall skin health. With a tropical climate characterized by high temperatures and sunny days, the potential for intense UV exposure peaks, especially around midday when the UV Index can reach a staggering 14. By staying informed about UV levels, you can enjoy the beautiful outdoors while minimizing risks to your health.

Hourly UV Index in San Francisco

The UV Index offers a telling glimpse into the sun’s intensity throughout the day. Starting at a modest 1 at 07:00, it quickly ramps up, reaching a more noticeable 4 by 08:00. The sun's power peaks dramatically at 12:00, with a striking 14, urging caution for those who venture outdoors. After a high of 13 during the early afternoon, the UV Index begins to decline, dropping to 6 by 15:00 and further to 3 by 16:00. As daylight wanes, levels return to a safer 1 at 17:00, eventually dipping to 0 by 19:00. Be sure to take precautionary measures during those peak hours to protect your skin while enjoying the sunshine!

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	13	extreme	10 min
12:00	14	extreme	10 min
13:00	13	extreme	10 min
14:00	9	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 Francisco

Throughout the year, UV index levels in this region remain consistently high, peaking in March and April with a UV index of 16, categorizing these months as high-risk for sun exposure. From January to May, and again from August to October, the UV index stays within the extreme category (ranging from 12 to 16), indicating that even short periods of sun exposure can lead to severe skin damage, with a burn time of just 10 minutes. Residents and visitors are strongly advised to take precautions during these months by wearing protective clothing, applying high-SPF sunscreen, and seeking shade whenever possible, especially during peak sunlight hours. Remember, the risk of UV radiation is significant year-round, so continuous vigilance is essential.

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	12	14	16	16	14	14	14	15	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