UV Index in Xihu, China

Last updated: August 1, 2025

Understanding the UV Index in Xihu, China, is crucial for safeguarding your skin and overall health. With UV levels peaking at a high of 12 around midday, awareness of the changing UV Index can help you prevent sunburn and long-term skin damage. Given Xihu’s semi-arid climate (BSk), the sun can be particularly intense, especially during summer months. By keeping track of UV levels throughout the day, you can take proactive measures to protect yourself from harmful rays and enjoy the beautiful outdoors safely.

Hourly UV Index in Xihu

As the sun rises, the UV Index (UVI) steadily climbs, beginning with a safe level of 1 at 07:00. By 09:00, it reaches 4, signaling a stronger need for sun protection. The peak intensity occurs between 12:00 and 13:00, where the UVI hits an alarming 12, illustrating the importance of taking precautions during these hours. As the afternoon wanes, values start to recede, dropping to 9 at 15:00 and further declining to 2 by 18:00. Wrap up your outdoor activities as the sun dips below the horizon, as the UVI falls back to 1 by 19:00. Always remember to stay safe under the sun, especially during those 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	1	low	45 min
08:00	2	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Xihu

Throughout the year, seasonal UV changes reveal fluctuating levels of sun exposure, with the months of May through August marked by extreme UV Index values of 10 or higher, posing the highest risk for sunburn and skin damage. March and April also see a rise to very high levels (8-10), indicating a significant increase in UV radiation as spring progresses. The high-risk months are therefore clearly identified as May to August, where a UV Index of 12 remains consistent, equating to a burn time of just 10 minutes. Residents and visitors are advised to take precautions during these months, including wearing sunscreen with high SPF, protective clothing, and seeking shade whenever possible, particularly during midday hours when the sun's rays are strongest. During the lower UV months—from November to February—while the exposure is moderate, it’s still recommended to practice sun safety, especially on bright, clear days.

Monthly Maximum UV Index for Xihu, China

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

The table above highlights how UV exposure in Xihu 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.

Xihu'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
Xihu	3	5	8	10	12	12	12	11	10	8	5	3
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
Shenzhen UVI	7	10	12	12	14	13	13	13	12	11	9	7