UV Index in Castro, Chile

Last updated: June 2, 2025

Understanding the UV Index in Castro, Chile, is essential for ensuring your skin remains healthy and protected from harmful solar radiation. With a varied climate characterized by cool maritime conditions, awareness of UV levels is key, especially during peak hours when sunburn risks increase. Even during seemingly mild conditions, UV exposure can lead to skin damage over time, making it crucial to monitor daily UV Index readings for effective sunburn prevention. Whether you're exploring the picturesque landscapes or enjoying outdoor activities, understanding Castro's typical UV exposure can help you take proactive steps to safeguard your skin while enjoying the beauty of this remarkable region.

Hourly UV Index in Castro

The UV Index data reveals a gradual increase in sun intensity throughout the morning, starting from a safe 0 at 07:00 and 08:00. As the day progresses, the index reaches its peak of 2 during midday, specifically at 11:00, 12:00, 13:00, and 14:00—a time when sun protection is advisable. After this peak, the UV levels gently decline to 1 by 15:00 and remain steady until 17:00, before dropping back to 0 in the evening hours at 18:00 and 19:00. This data underscores the importance of being sun-smart during those peak hours!

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	0	low	45 min
08:00	0	low	45 min
09:00	1	low	45 min
10:00	1	low	45 min
11:00	2	low	45 min
12:00	2	low	45 min
13:00	2	low	45 min
14:00	2	low	45 min
15:00	1	low	45 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 Castro

Throughout the year, UV exposure significantly fluctuates, with the highest risks occurring from November to February, when the UV Index often reaches 13 and the burn time is a mere 10 minutes. As we transition into March and October, the indices are still notably high at 9 and 8, respectively, with increased burn times of 15 minutes. During the milder months of May and July, the UV Index drops to 3 and 2, indicating moderate to low risk and allowing for longer exposure times of 30 to 45 minutes. Residents and visitors are advised to take extreme precautions in high-risk months by wearing sunscreen, protective clothing, and seeking shade to minimize skin damage. Regular checks of the UV Index are crucial for safe outdoor activities year-round.

Monthly Maximum UV Index for Castro, Chile

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

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

Castro's solar exposure compared to other cities in Chile. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castro	13	12	9	6	3	2	2	4	6	8	13	13
Santiago UVI	14	12	11	7	5	3	4	6	8	11	12	14
Valparaiso UVI	14	12	11	8	5	4	4	6	8	11	12	14
Vina del Mar UVI	14	12	11	8	5	4	4	6	8	11	12	14
Puente Alto UVI	15	14	12	8	6	4	6	8	11	12	14	15
Antofagasta UVI	15	15	13	10	8	6	7	9	11	14	15	15