UV Index in Sigiriya, Sri Lanka

Last updated: June 2, 2025

In Sigiriya, Sri Lanka, understanding the UV Index is essential for ensuring skin health and preventing sunburn. With its tropical climate, Sigiriya experiences significant UV exposure, especially during peak hours when indices can soar above 10. By being informed about UV levels, residents and visitors can take proactive measures to protect themselves from the harmful effects of excessive sun exposure. Whether you're exploring the ancient rock fortress or enjoying outdoor adventures, awareness of the UV Index helps you enjoy the beauty of this breathtaking location while keeping your skin safe and healthy.

Hourly UV Index in Sigiriya

As the sun rises, the UV Index begins at a low 2 at 07:00, making it a relatively safe time for early outdoor activities. However, by 08:00, the index climbs to 4, signaling the start of increased sun exposure. The intensity peaks at 11:00 with a remarkable level of 13, urging everyone to seek shade or wear protective measures. The UV rays remain potent until 13:00, with the index still at 10. As the afternoon progresses, the numbers dip, falling to 7 by 14:00 and tapering off to 4 at 15:00. The latter part of the day brings relief, as the UV Index drops steadily to 2 by 16:00, and by evening, it falls to a negligible 0 at 18:00 and 19:00. In summary, midday hours demand the most caution, while cooler evening hours provide a safe haven from harmful UV rays.

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.
TimeUVICategoryTime to Burn
07:002low45 min
08:004moderate30 min
09:008very high15 min
10:0011extreme10 min
11:0013extreme10 min
12:0012extreme10 min
13:0010very high15 min
14:007high25 min
15:004moderate30 min
16:002low45 min
17:001low45 min
18:000low45 min
19:000low45 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.
JanFebMarAprMayJunJulAugSepOctNovDec121315141413131414131210
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.
 JanFebMarAprMayJunJulAugSepOctNovDec
Jaffna UVI111314151312131314121110
Moratuwa UVI111314151412131414131110
Maharagama UVI111314151412131414131110
Dehiwala-Mount Lavinia UVI121314151412131414131110
Sigiriya121315141413131414131210
Colombo UVI121414151413131314131110