UV Index in Siwei, China

Last updated: July 2, 2025

Understanding the UV Index in Siwei, China is crucial for safeguarding your skin health, especially as you enjoy the region's beautiful outdoors. With temperatures peaking in the summer and a climate characterized as Dwa, Siwei experiences significant UV exposure, particularly between 10 AM and 2 PM, when levels can soar to a maximum of 10. This knowledge helps you take essential precautions against sunburn and long-term skin damage, allowing you to enjoy the sunshine safely. Stay informed and protect yourself to make the most of Siwei’s vibrant climate!

Hourly UV Index in Siwei

As the sun rises, the UV Index gradually transitions from a mild 1 at 07:00 to an invigorating 3 by 08:00. The peak UV intensity hits its stride between 12:00 and 13:00, reaching a striking 10, a clear call for sun protection. As the afternoon progresses, the index begins to decline, tapering off to 8 at 14:00, 6 at 15:00, and eventually settling to a gentle 2 by 17:00. By evening, the UV levels dip back down, returning to a safe 1, indicating it's time to relax and enjoy the cooler, softer light of sunset.

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	7	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	8	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	1	low	45 min

Monthly UV Index Trends in Siwei

During the year, the UV Index exhibits notable seasonal changes, significantly increasing in the warmer months. The high-risk months for sun exposure are from April to August, when the UV Index reaches levels classified as very high (8-10), resulting in a burn time as short as 15 minutes. In contrast, January and December present a low risk (UV Index 2), allowing for safer outdoor activities with a burn time of 45 minutes. Visitors and residents should take precautions during the high-risk months by seeking shade, wearing protective clothing, and applying sunscreen to minimize the risk of UV-related skin damage. Stay safe and enjoy the sun responsibly!

Monthly Maximum UV Index for Siwei, China

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

The table above highlights how UV exposure in Siwei 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.

Siwei'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
Siwei	2	4	6	8	9	10	10	10	8	7	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
Shenzhen UVI	7	10	12	12	14	13	13	13	12	11	9	7