UV Index in San Francisco, Philippines

Last updated: June 2, 2025

Awareness of the UV Index is crucial for residents and visitors of San Francisco, Philippines, as it plays a significant role in safeguarding skin health and preventing sunburns. With typical UV levels peaking at an astonishing 14 around noon, understanding these levels can empower you to make informed decisions about sun exposure and protection. The Af climate of San Francisco brings a unique blend of warmth and humidity, making it imperative to stay vigilant about UV risks. Whether you’re planning a leisurely day outdoors or simply enjoying the local scenery, being UV savvy is essential for ensuring your skin remains healthy and protected.

Hourly UV Index in San Francisco

The UV Index today paints a vivid picture of sun intensity throughout the day. Early risers will experience a gentle start at 07:00 with a low of 2, slowly escalating to a more noticeable 4 by 08:00. As the sun climbs higher, the UV Index reaches a peak of 14 at 12:00—the critical midday moment when sun protection is essential. From there, it begins to taper off, dropping to 12 at 13:00 before plunging down to 1 by 17:00. As evening approaches, UV exposure decreases, ultimately settling at 0 by 19:00. Remember to stay sun-safe during those peak hours!

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

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