UV Index in Jaffna, Sri Lanka

Last updated: June 2, 2025

In Jaffna, Sri Lanka, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels is essential to prevent sunburn and maintain long-term skin health, especially in a region known for its tropical climate and intense sunlight. With UV values peaking at 12 around noon, the risks of overexposure are heightened, making it vital to stay informed and take necessary precautions during the sunniest hours. By keeping an eye on the UV Index, you can enjoy the beauty of Jaffna while safeguarding your skin from potential harm.

Hourly UV Index in Jaffna

The UV Index data reveals a dynamic progression throughout the day, with the sun's intensity gradually rising from a modest 2 at 07:00 to a peak of 12 during both 11:00 and 12:00. This indicates a high risk for sun exposure, making it crucial to take protective measures. As the afternoon rolls in, the index declines, gently tapering off to 8 by 14:00, before plummeting to a mere 1 at 17:00 and hitting 0 by 19:00. Thus, for sun lovers and outdoor enthusiasts, the midday hours (10:00-14:00) are the golden time to enjoy the outdoors, while the diminishing levels later offer a safer reprieve. Remember to stay safe under the sun!

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	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 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.

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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Jaffna	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
Colombo UVI	12	14	14	15	14	13	13	13	14	13	11	10