UV Index in San Juan, Bolivia

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in San Juan, Bolivia, especially given its climate classification as BSk, characterized by sunny days and ample UV exposure. As the sun’s rays can significantly impact skin health, being aware of daily UV levels can help you take proactive steps against sunburn and long-term skin damage. During peak hours, particularly between 11 AM and 1 PM, the UV Index often rises to levels of 7 to 8, posing an increased risk for harmful effects. Whether you're enjoying outdoor activities or simply going about your day, staying informed about the UV Index can help ensure that you protect yourself under the Bolivian sun.

Hourly UV Index in San Juan

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 Juan

Throughout the year, the UV Index displays significant seasonal variation, with extreme exposure levels from January to April and again in August, September, October, and November. Concerned especially high-risk months include January, February, March, April, August, October, and November, where the UV Index remains at 18 or higher, indicating a burn time of as little as 10 minutes. Conversely, during June and July, although classified as very high, the burn time increases to 15 minutes due to a slightly lower index of 8 or 9. Visitors and residents should take precautions during these high-risk months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially during peak sunlight hours, to minimize health risks associated with UV exposure.

Monthly Maximum UV Index for San Juan, Bolivia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in San Juan. 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 Juan, 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 Juan UV Index with Other Bolivia Cities

The table above highlights how UV exposure in San Juan 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 Juan'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
Sucre UVI	17	17	16	14	11	9	10	12	15	17	17	18
San Juan	18	18	16	14	11	8	9	12	14	17	18	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