UV Index in San Francisco, Bolivia

Last updated: June 2, 2025

Understanding the UV Index in San Francisco, Bolivia is crucial for protecting your skin and overall health. With UV levels peaking during the sunny hours of late morning and early afternoon, awareness can help prevent painful sunburns and long-term skin damage. San Francisco's Cwb climate offers a unique blend of cool temperatures and occasional intense sun exposure, making it essential to stay informed about UV risks, particularly around noon when levels can soar to 8. By keeping track of the UV Index, you can safeguard your skin while enjoying the beautiful Bolivian landscapes.

Hourly UV Index in San Francisco

At dawn, the UV Index remains low, peaking at 1 by 08:00. As the sun rises higher, a notable increase occurs, reaching 3 at 09:00 and escalating dramatically to a maximum of 8 from 12:00 to 13:00. This midday surge indicates a higher risk for sun exposure, making it essential to take precautions such as wearing sunscreen and protective clothing. The intensity then gradually declines, dropping to 4 by 15:00, and continuing its descent to 0 by 19:00, marking the end of the sun’s peak influence for the day. Stay mindful of these hourly fluctuations to enjoy the sun safely!

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	1	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	6	high	25 min
15:00	4	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 shows significant seasonal variations, with extreme levels persisting from January to May, and a return to extreme conditions from September to December. The high-risk months include November and December, both peaking at a UV Index of 18, which necessitates caution for all outdoor activities. While summer months, particularly June and July, see a slight dip with a very high index of 8 and 9 respectively, the burn time remains critical — only 15 minutes for direct sunlight. Visitors and residents are advised to take necessary precautions, such as wearing protective clothing, applying sunscreen regularly, and seeking shade, especially during periods of high UV exposure. Always be aware of the UV Index to stay safe under the sun!

Monthly Maximum UV Index for San Francisco, Bolivia

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 Bolivia Cities

The table above highlights how UV exposure in San Francisco compares to other major locations across Bolivia. 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 Bolivia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Santa Cruz de la Sierra UVI	15	15	14	13	10	8	9	10	12	15	16	16
San Francisco	17	17	16	14	11	8	9	12	14	17	18	18
Sucre UVI	17	17	16	14	11	9	10	12	15	17	17	18
Sacaba UVI	17	18	17	15	12	10	10	13	15	17	18	19
Cochabamba UVI	18	18	17	15	12	10	11	13	16	18	18	19
Oruro UVI	19	19	17	16	13	10	11	14	16	19	19	19