UV Index in Santo Tomas, Peru

Last updated: May 3, 2025

Understanding the UV Index is crucial for the residents and visitors of Santo Tomas, Peru, where the sun's rays can reach intense levels, especially during midday. With UV indexes soaring as high as 13 from 11 AM to 1 PM, it's vital to be aware of these readings to prevent sunburn and protect your skin health. Santo Tomas, nestled in a high-altitude climate zone (ET), experiences unique exposure risks that require vigilance. By understanding the UV levels, individuals can take actionable steps to enjoy outdoor activities while minimizing the dangers of overexposure to ultraviolet radiation.

Hourly UV Index in Santo Tomas

As the sun rises higher, the UV Index showcases its dramatic dance throughout the day. Starting at a mild 1 at 07:00, the index climbs swiftly, hitting 3 by 08:00, then skyrocketing to a sizzling 10 at 10:00. The peak occurs at 11:00 and 12:00, both boasting a striking 13, making midday the most crucial time for sun safety. A gradual decline follows, with the index dropping to 4 by 15:00 and further dwindling to 1 by 17:00. As the day winds down, and night approaches, the UV levels settle to 0, reminding us that the sun's intensity can vary greatly. Stay sun-smart during those peak hours to enjoy the outdoors 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	3	moderate	30 min
09:00	7	high	25 min
10:00	10	very high	15 min
11:00	13	extreme	10 min
12:00	13	extreme	10 min
13:00	11	extreme	10 min
14:00	8	very high	15 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 Santo Tomas

Throughout the year, UV exposure remains consistently high, with the UV Index peaking at 22 in the winter months (January to March) and again in December. These months are categorized as extreme, with a burn time of just 10 minutes. The spring and fall months also reflect significant UV levels, particularly in April (17), September (17), and October (18), contributing to high-risk periods. Residents and visitors should be particularly cautious during these high-risk months, ensuring to protect their skin from UV damage through appropriate clothing, sunscreen, and limited exposure during peak sunlight hours. Consistently monitor UV levels year-round, as even the summer months show significant UV ratings, maintaining awareness and protective measures at all times.

Monthly Maximum UV Index for Santo Tomas, Peru

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

The table above highlights how UV exposure in Santo Tomas 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.

Santo Tomas'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
Santo Tomas	21	22	22	17	14	11	13	15	17	18	19	21