UV Index in Kathmandu, Nepal

Last updated: May 3, 2025

In the bustling city of Kathmandu, Nepal, awareness of the UV Index is crucial for safeguarding your skin and overall health. With the sun's rays intensifying during the day, understanding UV levels can help you prevent painful sunburns and long-term skin damage. Nestled in a Cwa climate zone, Kathmandu experiences significant UV exposure, especially during midday when the index peaks at 11. By staying informed about UV levels, you can protect yourself from harmful effects and enjoy the beauty of this vibrant city safely.

Hourly UV Index in Kathmandu

The UV Index data paints a clear picture of the day's sun intensity. Starting with a moderate value of 3 at 7:00 AM, the index quickly ramps up, reaching a peak of 11 between 11:00 AM and 12:00 PM, indicating the highest risk of harm from unprotected sun exposure. As the afternoon progresses, it gently declines to 9 at 1:00 PM and then steadily decreases, winding down to 3 by 3:00 PM. Post-sunset, the index drops to 0 by 6:00 PM, signaling a safe time to enjoy the evening outdoors. This hourly fluctuation highlights the importance of sun protection during peak 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.
Time	UVI	Category	Time to Burn
07:00	3	moderate	30 min
08:00	5	moderate	30 min
09:00	8	very high	15 min
10:00	10	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	9	very high	15 min
14:00	6	high	25 min
15:00	3	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 Kathmandu

Throughout the year, UV levels fluctuate significantly, with marked increases during the spring and summer months. January and December see a moderate UV Index of 5, allowing for longer exposure times without risk of burning. However, beginning in February, the Index rises to 7 (high), with March reaching 9 (very high). The extreme category is prominent from April to September, peaking in July at 14, where the burn time is a mere 10 minutes—making this period particularly hazardous. Visitors and residents should be vigilant during these high-risk months, especially from April to September, taking precautions such as wearing sunscreen, protective clothing, and seeking shade during peak hours. As fall approaches, the UV Index gradually decreases, but caution is still advised in October and November.

Monthly Maximum UV Index for Kathmandu, Nepal

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

The table above highlights how UV exposure in Kathmandu 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.

Kathmandu'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
Kathmandu	5	7	9	11	11	13	14	13	12	10	7	5
Patan UVI	5	7	9	11	11	13	14	13	12	10	7	5
Pokhara UVI	7	9	12	13	14	15	15	15	14	12	8	6