UV Index in Cartagena, Chile

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Cartagena, Chile, where the unique climate can elevate sun exposure risks. Awareness of UV levels is essential not only for preventing painful sunburns but also for maintaining long-term skin health. With a Csb climate characterized by mild summers and varying UV exposure throughout the day, it's vital to stay informed about peak UV times—particularly around noon when levels can reach a moderate 4. By keeping a close eye on the UV Index, you can enjoy the outdoors while safeguarding your skin against harmful rays.

Hourly UV Index in Cartagena

The UV Index throughout the day shows a gentle morning rise, starting at 0 at 07:00, then climbing to 1 by 08:00 and staying steady until it reaches 2 at 10:00. Midday brings the peak intensity, with the index soaring to 4 from 12:00 to 14:00, indicating a significant need for sun protection. As the afternoon wears on, the UV levels gradually decline, tapering back down to 1 by 16:00, before dropping to 0 after 18:00. This daily pattern highlights the importance of being mindful of UV exposure, especially between noon and early afternoon when the sun’s rays are at their strongest.

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	1	low	45 min
09:00	1	low	45 min
10:00	2	low	45 min
11:00	3	moderate	30 min
12:00	4	moderate	30 min
13:00	4	moderate	30 min
14:00	4	moderate	30 min
15:00	3	moderate	30 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 Cartagena

The UV index exhibits significant seasonal variation, with extreme levels persisting from January to March and returning in October to November, highlighting these months as high-risk periods for skin damage, with a rapid burn time of just 10 minutes. The spring month of April marks a transition to a very high category with a slightly increased burn time of 15 minutes before tapering to moderate levels in May through July, where individuals can safely enjoy up to 30 minutes of sun exposure. However, by August, UV levels rise to high, necessitating 25 minutes of careful exposure. In September, the risk escalates again to very high before returning to extreme levels by late autumn. Residents and visitors should take precautions during high-risk months by applying sunscreen, wearing protective clothing, and seeking shade during peak sun hours to minimize UV-related health risks.

Monthly Maximum UV Index for Cartagena, Chile

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

The table above highlights how UV exposure in Cartagena 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.

Cartagena'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
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
Cartagena	14	13	11	8	5	3	4	6	8	11	13	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