UV Index in Phnom Penh, Cambodia

Last updated: July 2, 2025

Understanding the UV Index is crucial for anyone enjoying the sunny skies of Phnom Penh, Cambodia. With its tropical climate and high UV exposure, being aware of UV levels can help take critical steps to prevent sunburn and protect your skin health. During peak hours, especially from 10 AM to 1 PM, the UV Index can soar to extreme levels, reaching a maximum of 14, which poses significant risks for skin damage. By staying informed about the daily fluctuations in UV levels, residents and visitors can enjoy the vibrant atmosphere of Phnom Penh while safeguarding their well-being under the sun.

Hourly UV Index in Phnom Penh

As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00. By 08:00, it climbs to 3, indicating a cautious need for sun protection. The real intensity kicks in by 09:00, reaching 6, and peaks at a striking 14 at 12:00—the hour when the sun is at its zenith. With readings of 13 still prevalent from 11:00 to 13:00, it’s a vital time to stay protected! As afternoon settles in, the UV levels gradually taper off; they dip to 6 by 15:00 and descend further to 3 at 16:00. By evening, the risk diminishes significantly with a return to 1 at 17:00, rounding off the day as twilight approaches with a 0 reading by 19:00. Stay safe in 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	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	10	very high	15 min
11:00	13	extreme	10 min
12:00	14	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Phnom Penh

The UV Index exhibits significant seasonal variation, peaking between February and September, when it reaches extreme levels of 14-15, resulting in a burn time of just 10 minutes for unprotected skin. January and December are slightly lower with a UV Index of 10, classified as very high, allowing for a burn time of 15 minutes. Notably, the months from February to November are categorized as high-risk, necessitating extra precautions for visitors and residents who plan to spend time outdoors. It is essential to wear sunscreen, protective clothing, and seek shade during peak hours to mitigate the risk of skin damage, especially during this high-risk period.

Monthly Maximum UV Index for Phnom Penh, Cambodia

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

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

Phnom Penh's solar exposure compared to other cities in Cambodia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Battambang UVI	10	13	15	14	14	13	14	14	14	13	11	10
Siem Reap UVI	10	13	15	14	14	13	14	14	14	12	11	10
Phnom Penh	10	14	15	15	14	13	14	14	14	13	11	10
Takeo UVI	10	14	15	15	15	13	14	14	14	13	11	10
Sihanoukville UVI	11	14	15	15	14	13	14	14	14	13	11	11