UV Index in Hangzhou, China

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Hangzhou, China, where the subtropical climate brings warm summers and significant sunlight. Being aware of UV levels helps in preventing sunburn and protecting skin health, which is vital for maintaining overall well-being. With UV Index readings often peaking at 11 during midday—indicating very high risk—it's essential to take precautions to minimize exposure. As you enjoy the beautiful surroundings of Hangzhou, stay informed about the UV Index to ensure safe outdoor activities and protect your skin from harmful rays.

Hourly UV Index in Hangzhou

The UV Index throughout the day paints a vivid picture of sun intensity. It begins with a mild reading of 2 at 07:00, gradually rising to a moderate 4 by 08:00. As the sun reaches its peak, the index surges to a striking 9 at 10:00, hitting a maximum of 11 at both 11:00 and 12:00—a clear indication to seek shade or apply sunscreen. The intensity then begins to dip, falling to 10 at 13:00, before gradually decreasing to 8 at 14:00. By 15:00, the index declines to 5, and as evening approaches, it settles at 2 by 17:00, before tapering off to 1 at 18:00 and finally reaching 0 at 19:00. This hourly trend highlights the importance of midday sun protection, ensuring a safe and enjoyable outdoor experience.

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	9	very high	15 min
11:00	11	extreme	10 min
12:00	11	extreme	10 min
13:00	10	very high	15 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	3	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 Hangzhou

The seasonal UV changes indicate a significant increase in UV exposure as the year progresses, with high-risk months being from March to October, where the UV Index reaches as high as 11 (extreme). Specifically, May to August poses the greatest risk, with a burn time of just 10 minutes in direct sunlight. Residents and visitors are advised to take precautionary measures during these months, including wearing protective clothing, sunglasses, and sunscreen to mitigate harmful effects. As the UV Index begins to decline in September, it remains important to stay vigilant until it drops to more moderate levels by December, when the burn time increases to 30 minutes again.

Monthly Maximum UV Index for Hangzhou, China

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

The table above highlights how UV exposure in Hangzhou 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.

Hangzhou'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
Hangzhou	5	6	9	10	11	11	11	11	10	8	6	4
Guangzhou UVI	7	9	11	12	13	13	13	12	11	10	9	7
Shenzhen UVI	7	10	12	12	14	13	13	13	12	11	9	7