UV Index in Sigiriya, Sri Lanka

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Sigiriya, Sri Lanka, where the sunny, tropical climate can lead to significant sun exposure. Being aware of UV levels not only helps in preventing painful sunburns but also plays a vital role in maintaining overall skin health. As the UV Index can peak at an intense 14 during midday hours, it’s essential to take precautions to protect yourself from harmful solar radiation. With typical exposure risks associated with these high UV levels, knowledge of the index empowers you to enjoy the beautiful sights of Sigiriya safely and sustainably.

Hourly UV Index in Sigiriya

At dawn, the UV Index begins modestly at 2 by 7:00 AM, but as the sun rises, so does the intensity of ultraviolet rays. By 8:00 AM, the index jumps to 5, marking the start of heightened UV exposure. The peak occurs at 11:00 AM and 12:00 PM, where it reaches a staggering 14, indicating a critical time for sun protection. After noon, the index begins to decline, dropping to 12 by 1:00 PM and falling further to 8 at 2:00 PM. As the afternoon progresses, the UV Index continues its descent, landing at 4 by 3:00 PM and further decreasing to 2 by 4:00 PM. Finally, the day winds down with minimal UV exposure, resting at 1 by 5:00 PM and dropping to 0 after 6:00 PM, highlighting the need for vigilance during those peak hours when UV radiation is most potent.

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	5	moderate	30 min
09:00	8	very high	15 min
10:00	12	extreme	10 min
11:00	14	extreme	10 min
12:00	14	extreme	10 min
13:00	12	extreme	10 min
14:00	8	very high	15 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 Sigiriya

Throughout the year, the UV Index remains critically high, peaking at 15 in March. The months of January to April continue to pose significant risk with UV Index values from 12 to 15, marking these as high-risk months for sun exposure. Although June through October have slightly lower indices ranging from 13 to 14, the exposure category remains extreme, indicating that visitors and residents should take precautions year-round. It is advisable to minimize outdoor activities during peak hours, wear protective clothing, and apply sunscreen regularly, especially from January to September, when the burn time is only 10 minutes. Even in December, although the UV Index drops to 10 with a longer burn time of 15 minutes, it is important to stay vigilant. Prioritizing skin protection is crucial for anyone spending time outdoors in this region.

Monthly Maximum UV Index for Sigiriya, Sri Lanka

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

The table above highlights how UV exposure in Sigiriya 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.

Sigiriya'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 UVI	12	13	14	15	14	12	13	14	14	13	11	10
Sigiriya	12	13	15	14	14	13	13	14	14	13	12	10
Colombo UVI	12	14	14	15	14	13	13	13	14	13	11	10