UV Index in Viacha, Bolivia

Last updated: July 2, 2025

In Viacha, Bolivia, staying informed about the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels helps residents and visitors alike prevent sunburn and long-term skin damage, especially during peak sun hours. Known for its unique Cwc climate, Viacha experiences significant UV exposure, with indexes soaring to a staggering 11 around midday. By being aware of daily UV fluctuations, you can take proactive measures to enjoy the beautiful sun while keeping your skin safe.

Hourly UV Index in Viacha

The UV Index rises steadily throughout the morning, starting at a mere 1 at 07:00 and 08:00. By 09:00, it climbs to 3, but the real intensity hits between 10:00 and 13:00, peaking at a scorching 11 around 12:00 and maintaining that level through 13:00. As the afternoon progresses, the index begins to decline, dropping to 10 at 14:00 and further down to 7 by 15:00. With the sun starting to set, it dips rapidly to 3 by 16:00, before returning to the safety of 1 by 17:00 and 18:00, and ultimately falling to 0 at 19:00. Throughout this period, it’s clear that mid-day demands extra caution in terms of sun exposure!

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	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	7	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 Viacha

Throughout the year, the UV Index in this region exhibits high values, particularly from January to November, consistently marking an extreme exposure category with a burn time of just 10 minutes in many months. The UV Index reaches its peak in early months, remaining at 19 until May, before slightly decreasing in June to 10 (very high), then escalating again in July to 11 (extreme). This trend continues, with August jumping to 14 and staying high through September and October at 16 and 18, respectively, before returning to 19 in November and December. Visitors and residents are strongly advised to take precautions, especially during high-risk months (January to April and July to November), by wearing protective clothing, applying sunscreen regularly, and limiting exposure during peak sunlight hours to reduce the risk of sunburn and skin damage.

Monthly Maximum UV Index for Viacha, Bolivia

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

The table above highlights how UV exposure in Viacha 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.

Viacha'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
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
Viacha	19	19	18	16	13	10	11	14	16	18	19	19