UV Index in Co To, Vietnam

Last updated: June 2, 2025

Understanding the UV Index in Co To, Vietnam is crucial for anyone enjoying this beautiful island's sunny beaches. Being aware of UV levels not only helps in the prevention of sunburn but also plays a vital role in maintaining long-term skin health. With Co To's tropical climate, sun exposure can lead to high UV risks, especially during peak hours when the index reaches a maximum of 13 around noon. By keeping an eye on the UV Index, you can enjoy all the outdoor activities this stunning destination has to offer while protecting your skin from harmful rays.

Hourly UV Index in Co To

As the sun rises, the UV Index creeps up from a low of 2 at 07:00. By 09:00, it reaches a moderate 7, signaling that sun protection is becoming essential. The peak intensity occurs at 12:00, when the UV Index soars to 13, a reminder of the midday sun's strength. From 11:00 to 13:00, it remains elevated, hitting a maximum of 12 before it gradually declines to 9 by 14:00. The late afternoon sees a noticeable drop, as the UV levels fall to 3 by 16:00. As the day winds down, the index drops to 1 by 17:00, then fades to 0 by 19:00, marking the end of a sun-drenched day. Remember to stay protected 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	2	low	45 min
08:00	4	moderate	30 min
09:00	7	high	25 min
10:00	10	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	11	extreme	10 min
14:00	9	very high	15 min
15:00	5	moderate	30 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 Co To

Throughout the year, UV Index levels show significant seasonal variation, with the highest readings occurring from March to October. During these months, particularly from May to August, the UV Index reaches an extreme level of 13 to 14, with a burn time as short as 10 minutes. The high-risk months specifically include March through October, necessitating vigilant sun protection measures. Visitors and residents are strongly advised to limit sun exposure, especially during peak hours, wear protective clothing, and apply broad-spectrum sunscreen. In contrast, November and December present a lower risk with UV Index levels of 9 and 7, respectively, and longer burn times, allowing for easier sun safety precautions. Always prioritize skin protection, especially in the peak UV season.

Monthly Maximum UV Index for Co To, Vietnam

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

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

Co To's solar exposure compared to other cities in Vietnam. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Hanoi UVI	8	10	12	12	13	12	12	13	13	11	9	7
Haiphong UVI	8	10	12	13	12	13	13	13	13	11	9	7
Co To	8	10	12	13	13	13	14	14	13	11	9	7
Da Nang UVI	10	12	14	15	14	13	14	14	13	12	10	9
Ho Chi Minh City UVI	10	13	15	14	14	12	13	14	13	13	11	10
Bien Hoa UVI	10	14	15	15	14	13	14	14	13	12	11	10