UV Index in Jaffna, Sri Lanka

Last updated: July 2, 2025

Understanding the UV Index in Jaffna, Sri Lanka, is crucial for protecting your skin and overall health. With the sun's intensity reaching dangerous levels, especially during midday—where it peaks at 13—being aware of UV exposure can help prevent sunburn and long-term skin damage. Sri Lanka's tropical climate brings consistent sunshine, but it also means that UV risks can be high, particularly in the summer months. Staying informed about these levels empowers residents and visitors alike to take necessary precautions and enjoy the beautiful Jaffna landscape safely.

Hourly UV Index in Jaffna

As the day unfolds, the UV Index rises dramatically, reaching its peak at 12:00 PM with an impressive 13. Early morning hours start off gently, with a maximum of 2 at 7:00 AM, gradually climbing to 4 by 8:00 AM. The sun's intensity truly kicks in at 10:00 AM, hitting a notable 10 before skyrocketing to 12 by 11:00 AM. A slight decline begins after noon, with the index dropping to 11 at 1:00 PM, then tapering off to 8 by 2:00 PM. As the afternoon progresses, we see a further decrease, plummeting to 5 at 3:00 PM and drifting downwards to 1 by 5:00 PM, before the sunshine's effects completely fade away by 6:00 PM, when the UV Index reaches 0. It’s a reminder to stay sun-safe during those prime 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.
TimeUVICategoryTime to Burn
07:002low45 min
08:004moderate30 min
09:007high25 min
10:0010very high15 min
11:0012extreme10 min
12:0013extreme10 min
13:0011extreme10 min
14:008very high15 min
15:005moderate30 min
16:002low45 min
17:001low45 min
18:000low45 min
19:000low45 min

Monthly UV Index Trends in Jaffna

The UV Index in this region demonstrates seasonal variations that peak during the early months of the year, remaining consistently in the extreme exposure category (11-15) from January through October. Specifically, March and April show the highest UV levels, reaching 14 and 15 respectively. High-risk months include March, April, and September, where UV exposure is at its peak, with a burn time of just 10 minutes for most of the year. Visitors and residents should take precautionary measures during these months, such as wearing protective clothing, using sunscreen with high SPF, and seeking shade, particularly between 10 a.m. and 4 p.m. Even as we transition into the cooler months, October to December exhibit a notable drop in UV levels, although November still maintains a high level of caution with a UV index of 11. It’s essential to remain vigilant year-round, as UV exposure can still pose a risk, particularly in sunny conditions.

Monthly Maximum UV Index for Jaffna, Sri Lanka

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Jaffna. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec111314151312131314121110
Data source: Statistical UV Index data for Jaffna, 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 Jaffna UV Index with Other Sri Lanka Cities

The table above highlights how UV exposure in Jaffna 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.
Jaffna's solar exposure compared to other cities in Sri Lanka. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Jaffna111314151312131314121110
Moratuwa UVI111314151412131414131110
Maharagama UVI111314151412131414131110
Dehiwala-Mount Lavinia UVI121314151412131414131110
Colombo UVI121414151413131314131110