UV Index in Siwei, China

Last updated: June 2, 2025

In Siwei, China, being aware of the UV Index is crucial for safeguarding your skin’s health. Understanding UV levels is not just about avoiding sunburn; it plays a vital role in long-term skin protection and overall well-being. Siwei, with its Dwa climate, experiences significant UV exposure, particularly during peak hours when the index reaches a maximum of 10 around midday. By staying informed about UV levels, you can take proactive steps to minimize risks, ensuring that your outdoor activities remain enjoyable and safe under the sun.

Hourly UV Index in Siwei

The UV Index throughout the day paints a vivid picture of sun intensity. Starting at a mild 1 at 7:00 AM, the index gradually climbs, reaching a more noticeable 3 by 8:00 AM. The real surge occurs between 9:00 AM and 12:00 PM, where it peaks at 10—a crucial time for sun protection. After that, it begins to gently decline, with 9 at 1:00 PM, 8 at 2:00 PM, and dropping further to 6 by 3:00 PM. As the sun starts its descent, the index sees a steady fall, ending at a comfortable 1 by 6:00 PM, making the later hours much safer for outdoor activities. Pay attention to the height of UV levels around midday for optimal sun safety!

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	9	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