UV Index in San Francisco, Philippines

Last updated: May 3, 2025

Understanding the UV Index in San Francisco, Philippines, is crucial for protecting your skin and overall health. With levels peaking at 14 during midday, awareness of UV exposure helps prevent sunburns and long-term skin damage. Given San Francisco's tropical climate, the sun's intensity can pose significant risks, especially between 10 AM and 2 PM when UV levels are highest. By staying informed about the UV Index and taking necessary precautions, you can enjoy the beautiful outdoors while safeguarding your skin.

Hourly UV Index in San Francisco

The UV Index peaks dramatically during the midday hours, illustrating the sun's intensity in compelling detail. Starting at a modest 2 by 07:00, it swiftly ascends as the day unfolds. By 08:00, it jumps to 5, and then reaches a significant 8 at 09:00. The sun is at its fiercest between 10:00 and 12:00, with the index soaring to 14, an indication to take extra precautions! As 13:00 rolls around, the UV level dips slightly to 12, only to further decrease to 9 by 14:00. Post-midday, the sun's strength wanes; it dramatically drops to 5 by 15:00 and decreases to 1 by 17:00, finally settling at 0 by 19:00. Such data highlights the importance of sun protection during the peak hours when the UV intensity is at its 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	5	moderate	30 min
09:00	8	very high	15 min
10:00	12	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	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in San Francisco

Throughout the year, the UV Index in this region remains at an extreme level, with a consistent burn time of only 10 minutes across all months. January through March witnesses the highest UV readings, peaking at 15 in both March and April. The high-risk months for sun exposure are from February to September, where the UV Index reaches 13 or above. Despite a slight decrease to 11 in the final months, the risk remains significant. Visitors and residents are strongly advised to take precautions such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade, particularly during peak hours to avoid harmful effects from UV radiation.

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	14	14	14	14	15	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