UV Index in Sion, Peru

Last updated: June 2, 2025

Understanding the UV Index in Sion, Peru is crucial for protecting your skin and overall health. With high UV levels peaking around noon, awareness of these fluctuations helps in preventing sunburn and reducing long-term skin damage. Sion's Af climate brings with it intense sun exposure, making it vital to stay informed and take proper precautions throughout the day. With UV readings soaring to 12 during the peak hours, knowing when to seek shade or apply sunscreen is essential to enjoying the outdoor beauty of Sion safely.

Hourly UV Index in Sion

The UV Index throughout the day reveals a dynamic range of solar intensity, peaking at 12 around noon. Starting the day gently, the index registers a low 1 at 7:00 AM, gradually rising to 2 by 8:00 AM. As the sun climbs higher, it reaches 5 by 9:00 AM, then surges to a robust 11 by 11:00 AM, signaling higher caution for outdoor activities. The peak at midday is a daunting 12, urging everyone to seek shade and wear protective gear. The intensity begins to taper off in the afternoon, dropping back to 8 at 2:00 PM and further to 5 by 3:00 PM. By the late afternoon, the index drops significantly to 1 at 5:00 PM and settles at 0 by 6:00 PM, giving a gentle reminder that the sun's might can vary dramatically throughout the day.

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	11	extreme	10 min
14:00	8	very high	15 min
15:00	5	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 Sion

Throughout the year, the UV Index in this region indicates extreme exposure levels, particularly from January through April, where the index remains consistently high at 16 to 17. As a result, individuals are at significant risk for sunburn within just 10 minutes of unprotected sun exposure, making these months (January to April) the highest-risk periods. During May and September, the UV Index decreases slightly to 14, but precautions should still be taken as burn time remains at 10 minutes. In contrast, from June to August, although the UV Index drops to 12, the extreme category persists, with the same burn time applicable. Visitors and residents are strongly advised to protect their skin during all months, especially during the high-risk periods by using sunscreen, wearing protective clothing, and seeking shade to minimize UV exposure and prevent skin damage.

Monthly Maximum UV Index for Sion, Peru

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

The table above highlights how UV exposure in Sion 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.

Sion'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
Sion	16	16	17	16	14	12	12	12	14	15	15	15
Arequipa UVI	18	17	17	15	12	10	11	13	15	17	18	17