UV Index in Ilam, Nepal

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Ilam, Nepal, where intense sunlight can pose significant risks to skin health. As the UV Index peaks at 14 during midday, awareness of these levels is essential for preventing sunburn and protecting against long-term skin damage. With Ilam's Cwa climate, characterized by warm summers and varied exposure to sunlight, being informed about UV exposure risks helps ensure safe and enjoyable outdoor activities throughout the year. Stay vigilant and prioritize your skin health to fully enjoy the beauty of Ilam!

Hourly UV Index in Ilam

The UV Index data reveals a dramatic rise in sun intensity as the day progresses. Starting at a moderate level of 4 at 07:00, the UV Index peaks at a scorching 14 by 11:00. From there, it begins to wane, dropping to 4 by 15:00. As the day wears on, the UV Index declines steadily, hitting zero by 19:00, indicating safe conditions as the sun sets. It's crucial to take precautions during peak hours, especially between 10:00 and 14:00, when the risk of skin damage is greatest. Stay sun-safe and enjoy the daylight wisely!

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	4	moderate	30 min
08:00	7	high	25 min
09:00	10	very high	15 min
10:00	13	extreme	10 min
11:00	14	extreme	10 min
12:00	13	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 Ilam

Throughout the year, UV exposure levels vary significantly, with higher risks occurring during the summer months. March marks the beginning of an increase in UV levels, peaking in July with a UV Index of 15, which falls under the extreme exposure category and results in a burn time of only 10 minutes. This intensity persists through August and begins to slightly decrease in September before dropping again into the very high category in October and November. The high-risk months for UV exposure are thus concentrated from March to September, particularly emphasizing the extreme months of April through August. Residents and visitors should take precautions during these periods, including wearing sunscreen, protective clothing, and seeking shade to limit sun exposure. In contrast, January, February, and December present reduced yet still noteworthy UV levels, advising consistent sun safety even in the winter months.

Monthly Maximum UV Index for Ilam, Nepal

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

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

Ilam's solar exposure compared to other cities in Nepal. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Biratnagar UVI	5	6	8	9	10	11	13	12	12	9	7	5
Birganj UVI	5	6	8	10	10	12	13	12	11	9	7	5
Patan UVI	5	7	9	11	11	13	14	13	12	10	7	5
Kathmandu UVI	5	7	9	11	11	13	14	13	12	10	7	5
Ilam	6	7	9	11	12	14	15	14	12	10	8	6
Pokhara UVI	7	9	12	13	14	15	15	15	14	12	8	6