UV Index in Heyun, China

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Heyun, China, where sun exposure can pose significant health risks. With a climate classified as Cfa, Heyun typically experiences high UV levels, particularly from late morning to early afternoon. This knowledge is essential for preventing sunburn and protecting your skin health, especially when UV Index readings soar to 13 during peak hours. By being aware of the UV Index, you can take proactive measures to safeguard against harmful effects, ensuring your time outdoors remains enjoyable and safe.

Hourly UV Index in Heyun

From 7:00 AM to 8:00 AM, the UV Index starts off low at a maximum of 1, making it a safe time for morning activities. By 9:00 AM, it climbs to 5, signaling moderate sun exposure. The intensity peaks during 11:00 AM and 12:00 PM, hitting a striking 12 and 13, indicating a high risk for harm from unprotected sun exposure. As the afternoon progresses, from 1:00 PM to 2:00 PM, the UV Index remains elevated at 13 before gradually tapering off to 11 at 2:00 PM. In the late afternoon and evening, the levels drop significantly, falling back to 4 by 4:00 PM, and further declining to 1 after 6:00 PM. It's essential to take precautions during the peak hours to enjoy the sun safely!

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	5	moderate	30 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Heyun

Throughout the year, UV exposure changes significantly, with the highest risk months typically from March to August, where UV Index values consistently reach the extreme level of 12 or 13. Notably, March, April, May, June, July, and August all present a burn time of just 10 minutes, indicating a critical need for sun protection during these periods. Conversely, UV Index values decrease in January, October, November, and December, when exposure is categorized as high or very high with longer burn times of 15 to 25 minutes. Visitors and residents are strongly advised to adopt sun safety measures—such as wearing sunscreen, protective clothing, and seeking shade during peak hours—especially during the extreme UV months to mitigate the risk of skin damage.

Monthly Maximum UV Index for Heyun, China

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

The table above highlights how UV exposure in Heyun 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.

Heyun'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
Heyun	7	9	12	12	13	12	13	13	11	10	9	7
Shenzhen UVI	7	10	12	12	14	13	13	13	12	11	9	7