UV Index in Nanjing, China

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Nanjing, China, where exposure to harmful solar radiation can vary dramatically throughout the day. The UV levels here can peak at an intense 13 around noon, emphasizing the need for vigilance against sunburn and long-term skin damage. With Nanjing's Cwa climate characterized by hot summers and varying weather patterns, being proactive about UV protection can help ensure skin health while enjoying outdoor activities. Keep an eye on the UV Index to safeguard yourself and your loved ones from the unseen dangers of excessive sun exposure!

Hourly UV Index in Nanjing

As the sun rises, the UV Index starts off low at 1 at 07:00 but quickly gains momentum. By 09:00, the index surges to 6, signaling the onset of midday intensity. The peak arrives at 12:00, where it reaches a striking 13—a time when sun safety becomes crucial. As the afternoon rolls in, the levels gradually taper, dipping to 10 by 14:00, then dropping to 6 by 15:00. A gentle decline continues into the evening, with readings falling to 1 at 18:00 and finally settling at 0 by 19:00. It's a vivid reminder of the sun's power; staying protected during the peak hours is essential!

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	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Nanjing

The UV Index typically peaks during the warmer months, with high-risk periods identified from March through September. In March, the UV Index reaches 12, categorized as extreme, with a burn time of just 10 minutes. This intensity continues into July and August, where the UV Index stays at its highest level of 13, maintaining the extreme risk and minimal burn time. As temperatures begin to cool, the UV Index slightly decreases to 10 in October and 9 in November, both still classified as very high. To stay safe, it is essential for visitors and residents to take precautions during these high-risk months, including wearing protective clothing, applying sunscreen frequently, and seeking shade during peak hours.

Monthly Maximum UV Index for Nanjing, China

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

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

Nanjing's solar exposure compared to other cities in China. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Beijing UVI	2	3	5	8	9	9	10	9	7	6	4	2
Chengdu UVI	5	6	8	10	12	11	11	10	11	8	6	4
Shanghai UVI	5	6	8	10	10	11	12	11	11	8	6	4
Guangzhou UVI	7	9	11	12	13	13	13	12	11	10	9	7
Nanjing	7	10	12	12	13	13	13	13	12	10	9	7
Shenzhen UVI	7	10	12	12	14	13	13	13	12	11	9	7