nomadseason

UV Index in San Francisco, Bolivia

Last updated: May 3, 2025

Understanding the UV Index in San Francisco, Bolivia, is crucial for protecting your skin and overall health. With the altitudinal climate of this region, awareness of UV levels helps in preventing sunburn and reducing the long-term risks of skin damage. San Francisco experiences a Cwb climate, characterized by a temperate atmosphere that can lead to significant UV exposure, especially from 10 AM to 4 PM, when the index peaks at a dangerous 10. By staying informed about daily UV fluctuations, you can take proactive steps to safeguard your skin while enjoying the beautiful Bolivian sun.

Hourly UV Index in San Francisco

The UV Index throughout the day showcases a significant rise in sun exposure, starting low at 1 at 07:00 and reaching its peak of 10 between 12:00 and 13:00. This suggests a high level of UV radiation during midday, making it crucial for individuals to take precautions to protect their skin. As the afternoon progresses, the UV Index begins to decline, dropping to 5 by 15:00 and further decreasing to 1 by 17:00. By 18:00, it returns to 0, indicating a safe period with no UV exposure. It's clear that the strongest UV radiation is concentrated in the midday hours; therefore, staying shaded and applying sunscreen during this time is highly recommended for safety.

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:002low45 min
09:004moderate30 min
10:007high25 min
11:009very high15 min
12:0010very high15 min
13:0010very high15 min
14:007high25 min
15:005moderate30 min
16:002low45 min
17:001low45 min
18:000low45 min
19:000low45 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.
JanFebMarAprMayJunJulAugSepOctNovDec1717161410891214171818
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.
 JanFebMarAprMayJunJulAugSepOctNovDec
Santa Cruz de la Sierra UVI1515141310891012151616
San Francisco1717161411891214171818
Sucre UVI17171614119101215171718
Sacaba UVI171817151210101315171819
Cochabamba UVI181817151210111316181819
Oruro UVI191917161310111416191919