UV Index in Son Tay, Vietnam

Last updated: July 2, 2025

In Son Tay, Vietnam, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. The UV levels here can reach a peak of 12, particularly during midday hours, highlighting the importance of protection against harmful UV rays. With a Cwa climate characterized by hot summers and mild winters, residents and visitors alike face significant risks of UV exposure, making it essential to understand local UV trends to enjoy the sun safely. Staying informed allows you to take necessary precautions, ensuring that your time outdoors is both enjoyable and safe.

Hourly UV Index in Son Tay

The UV Index provides a vital insight into sun exposure throughout the day, peaking during the late morning to early afternoon hours. At 07:00, it starts off low at 2, but by 08:00, it rises to 4, indicating increasing sun intensity. The real surge happens between 09:00 and 12:00, where it climbs dramatically to a maximum of 12 at 11:00 and 12:00. As the sun begins to dip after 13:00, the index gradually decreases to 11 at 1 PM and gently tapers off to 9 at 2 PM. By 3 PM, it continues to decline to 6, and by the evening, it reaches a minimal 1 at both 5 PM and 6 PM, finally falling to 0 by 7 PM. This hourly breakdown urges us to protect our skin during the peak hours, especially when the index hits its zenith.

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	12	extreme	10 min
13:00	11	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 Son Tay

The UV Index reflects significant seasonal variations, with the highest levels occurring from March to October, where values frequently reach between 12 and 13 in the extreme exposure category. January and February are marked as very high with indices of 8 and 10 respectively, while November maintains a very high level of 9 before dropping to high in December at 7. High-risk months are primarily from March to September, where the burn time is drastically reduced to just 10 minutes during peak hours. For both residents and visitors, it is crucial to take precautions during these peak UV periods, such as wearing protective clothing, applying broad-spectrum sunscreen, and limiting sun exposure, especially during midday hours to minimize the risk of skin damage.

Monthly Maximum UV Index for Son Tay, Vietnam

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

The table above highlights how UV exposure in Son Tay 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.

Son Tay'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
Son Tay	8	10	12	12	13	12	12	13	13	11	9	7
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
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