UV Index in Cusco, Peru

Last updated: June 2, 2025

In Cusco, Peru, understanding the UV Index is essential for protecting your skin and overall health. This historic city, nestled high in the Andes Mountains, experiences significant UV exposure, particularly during mid-day when levels can reach a staggering 11 on the scale. With the potential for sunburn occurring in mere minutes, being aware of these UV levels can help you take proactive measures against sun damage. The cool, high-altitude climate may be deceiving, making it easy to underestimate the strength of the sun. Staying informed about the UV Index is key to enjoying your time outdoors while safeguarding your skin's health.

Hourly UV Index in Cusco

At 07:00, the UV Index starts low at 1, gradually climbing to 3 by 08:00. As the sun rises higher, the intensity surges, peaking at a striking 11 by 11:00 and remaining at that level until 12:00. The afternoon sees a slight decrease, with the index slipping to 10 by 13:00 and then further to 7 at 14:00. By mid-afternoon, the UV Index does a dramatic drop to 4 at 15:00, and by 16:00, it falls back to 1. The sun begins to set, leading to a complete reduction, bringing UV levels down to 0 by 19:00. This data illustrates a typical day of high UV exposure during the midday hours, highlighting the importance of sun protection at peak times.

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	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	4	moderate	30 min
16:00	1	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 Cusco

Throughout the year, UV Index values remain consistently high, with extreme exposure categories recorded from January through December. The months of December (UV Index 22), January (UV Index 19), February (UV Index 19), November (UV Index 19), and March (UV Index 18) are notably high-risk, where even short sun exposure can cause burns in just 10 minutes. Visitors and residents should take precautions year-round, including wearing sunscreen with high SPF, donning protective clothing, and seeking shade during peak sun hours to mitigate the risks associated with prolonged UV exposure. Prioritizing skin protection is crucial, especially during these high-risk months.

Monthly Maximum UV Index for Cusco, Peru

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

The table above highlights how UV exposure in Cusco compares to other major locations across Peru. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Cusco's solar exposure compared to other cities in Peru. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Callao UVI	14	14	14	12	10	9	10	11	12	13	14	13
Lima UVI	14	14	14	12	10	9	10	11	12	13	14	13
Trujillo UVI	15	15	15	14	12	11	11	11	13	14	14	14
Chiclayo UVI	14	15	15	14	13	11	11	12	15	14	14	13
Arequipa UVI	18	17	17	15	12	10	11	13	15	17	18	17
Cusco	19	19	18	17	14	11	13	14	16	18	19	22