UV Index in San Gregorio, Peru

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of San Gregorio, Peru, where sun exposure can pose significant health risks. The UV Index provides essential information about the strength of solar UV radiation, which can lead to sunburn and long-term skin damage if not properly managed. With a hot semi-arid climate (BWh), San Gregorio experiences peak UV levels that can reach as high as 12 around midday, indicating extreme risk of harm from unprotected sun exposure. By staying informed about the UV index, you can take proactive measures to protect your skin and enjoy the beautiful Peruvian sun safely.

Hourly UV Index in San Gregorio

As the day unfolds, the UV Index rises steadily, peaking at a striking 12 between noon and 1 PM, a clear signal for the sun's intense power. Starting from a gentle 1 at 7 AM, it escalates to a moderate 4 by 9 AM, and then surges to an 8 by 10 AM, urging early risers to seek shade. The index reaches its zenith with an aggressive 11 at 11 AM, warning of the necessity to protect skin. As the afternoon wears on, it begins to decline, dropping to a 9 by 2 PM, and dwindling further to a 3 by 4 PM. By the time the clock strikes 6 PM, the index returns to a modest 1, providing a gentle reminder of the day’s solar intensity before fading to 0 by 7 PM. Enjoy the sun, but stay 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	2	low	45 min
09:00	4	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	6	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 San Gregorio

The UV Index in our region remains consistently high throughout the year, with extreme exposure levels recorded from January through November. Notably, the months of March and September peak with an index of 17 and 16, respectively, indicating significant risk for sunburn. Visitors and residents should be particularly cautious during these high-risk months, as the burn time remains as low as 10 minutes across all months. It is crucial to take protective measures such as wearing sunscreen, protective clothing, and seeking shade to mitigate the dangers associated with UV exposure during this prolonged high-risk period.

Monthly Maximum UV Index for San Gregorio, Peru

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

The table above highlights how UV exposure in San Gregorio 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 Gregorio'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
San Gregorio	16	16	17	16	14	12	12	13	16	16	15	15
Arequipa UVI	18	17	17	15	12	10	11	13	15	17	18	17