UV Index in Dehiwala-Mount Lavinia, Sri Lanka

Last updated: June 2, 2025

Understanding the UV Index is essential for residents and visitors of Dehiwala-Mount Lavinia, Sri Lanka, where the sun's rays can be both inviting and intense. With a tropical climate that typically features high UV exposure, being aware of the UV levels throughout the day is crucial for preventing sunburn and protecting your skin health. The data indicates significant fluctuations in UV strength, peaking at an intense 12 during midday hours—making awareness key to enjoying the outdoors safely. By keeping an eye on the UV Index, you can take proactive steps to shield yourself from harmful effects and make the most of the beautiful, sun-soaked coast of Dehiwala-Mount Lavinia.

Hourly UV Index in Dehiwala-Mount Lavinia

The UV Index data reveals a striking daily pattern in sun exposure. Starting at 07:00, the index is a modest 2, but by 09:00, it ramps up to 7, signaling a significant increase in UV intensity. The peak occurs at 11:00 and 12:00, where it reaches a high of 12, indicating that it's crucial to seek shade and wear protective gear. As the afternoon progresses, the index begins to decline, dropping to 4 by 15:00 and further down to 1 by 17:00, before fading to 0 at 19:00. It's essential to be mindful of these hours, particularly between 10:00 and 14:00, when sun protection is paramount for outdoor activities.

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	7	high	25 min
15:00	4	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 Dehiwala-Mount Lavinia

The UV Index exhibits seasonal variations, remaining critically high throughout the year, with extreme exposure categories dominating from January to October. Notably, the highest UV levels occur from March to April (UV Index 14-15), marking these months as high-risk periods for sunburn, with a rapid burn time of just 10 minutes. While the UV Index dips slightly in November (11) and December (10), where the burn time increases to 15 minutes, caution is still advised. Visitors and residents are urged to utilize sunscreen, seek shade, and wear protective clothing year-round, especially during the peak months, to minimize the risk of UV-related health issues.

Monthly Maximum UV Index for Dehiwala-Mount Lavinia, Sri Lanka

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Dehiwala-Mount Lavinia. 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 Dehiwala-Mount Lavinia, 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 Dehiwala-Mount Lavinia UV Index with Other Sri Lanka Cities

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

Dehiwala-Mount Lavinia's solar exposure compared to other cities in Sri Lanka. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Jaffna UVI	11	13	14	15	13	12	13	13	14	12	11	10
Moratuwa UVI	11	13	14	15	14	12	13	14	14	13	11	10
Maharagama UVI	11	13	14	15	14	12	13	14	14	13	11	10
Dehiwala-Mount Lavinia	12	13	14	15	14	12	13	14	14	13	11	10
Colombo UVI	12	14	14	15	14	13	13	13	14	13	11	10