UV Index in San Luis, Peru

Last updated: May 3, 2025

In San Luis, Peru, being aware of the UV Index is crucial for maintaining optimal skin health and preventing sunburn. With the climate characterized as Cfb, residents and visitors alike experience varied UV levels throughout the day, peaking dramatically between 10 AM and 2 PM. During these hours, UV Index readings can soar to a staggering 15, indicating extreme risk of harm from unprotected sun exposure. Understanding these levels empowers individuals to take proactive measures, ensuring their time outdoors is both enjoyable and safe. Protect yourself from the perils of excessive UV exposure by staying informed and embracing sun safety in San Luis.

Hourly UV Index in San Luis

As the sun rises, the UV Index begins at a mild 1 at 7 AM, gradually climbing to a comfortable 3 by 8 AM. By 9 AM, it surges to 6, signaling the start of a more intense sun exposure. The peak arrives at 12 PM with a striking 15, making it essential to take protective measures. From there, it starts to decline slightly, resting at 10 by 2 PM and falling to 6 by 3 PM. As the day winds down, the UV Index decreases to 3 at 4 PM, then drops to a safe 1 by 5 PM. Finally, as dusk settles in, the index levels off at 0 by 6 PM and remains there, marking the end of the sun's harshest rays. Stay protected during those peak hours to enjoy the sunny day while keeping your skin safe!

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	10	very high	15 min
11:00	14	extreme	10 min
12:00	15	extreme	10 min
13:00	14	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 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 Luis

Throughout the year, UV index values consistently remain in the extreme range, peaking from January to April with levels reaching 19 and a burn time of only 10 minutes. The high-risk months for UV exposure are between January and April as well as in September, where the UV Index remains at high levels (up to 18). Despite a slight decrease in June and July, the UV risk remains significant with values around 13 to 14, followed by another uptick in September to November. Visitors and residents are advised to take precautions year-round: wear protective clothing, apply broad-spectrum sunscreen, and limit sun exposure during peak hours to safeguard against harmful UV rays.

Monthly Maximum UV Index for San Luis, Peru

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

The table above highlights how UV exposure in San Luis 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.

San Luis'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
San Luis	18	19	19	18	15	13	14	14	17	18	17	17