UV Index in Mersch, Luxembourg

Last updated: July 2, 2025

Awareness of the UV Index is crucial for residents of Mersch, Luxembourg, especially as the sun's rays can pose significant risks to skin health. Understanding UV levels not only helps in preventing painful sunburns but also plays a vital role in reducing the long-term effects of sun exposure, such as skin cancer. Mersch experiences a maritime temperate climate (Cfb), leading to variable UV exposure throughout the year. During peak hours, particularly between 12:00 PM and 2:00 PM, the UV Index can reach levels as high as 8, indicating a high risk for harm to unprotected skin. Staying informed and taking proper precautions can help you enjoy the sun safely!

Hourly UV Index in Mersch

The UV Index today begins on a gentle note, peaking at just 1 during the early hours of 07:00 and 08:00. As the sun rises higher, it takes a significant leap to 3 by 09:00 and reaches a moderate 4 by 10:00. The sun's intensity climbs to a robust 6 at 11:00, before hitting its zenith at a powerful 8 from 13:00 to 14:00. After this peak, the UV index gradually descends, softening to 7 at 15:00, and continuing down to 4 by 17:00. As the day winds down, conditions remain mild with readings of 3 at 18:00 and finally settling at 2 by 19:00. It's an excellent reminder to stay sun-safe during those prime 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	1	low	45 min
09:00	3	moderate	30 min
10:00	4	moderate	30 min
11:00	6	high	25 min
12:00	7	high	25 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 min
16:00	6	high	25 min
17:00	4	moderate	30 min
18:00	3	moderate	30 min
19:00	2	low	45 min

Monthly UV Index Trends in Mersch

Throughout the year, the UV Index experiences significant fluctuations, with high-risk months identified primarily from April to August, where the index peaks at an alarming 9 in June. During these months, the exposure category escalates to very high, resulting in a burn time of just 15 minutes for unprotected skin. In contrast, January, November, and December have low UV levels, making sun protection less critical, with burn times extending to 45 minutes. As such, it’s essential for both visitors and residents to stay vigilant during the peak months by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade, especially between 10 AM and 4 PM, when UV rays are strongest.

Monthly Maximum UV Index for Mersch, Luxembourg

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

The table above highlights how UV exposure in Mersch compares to other major locations across Luxembourg. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Mersch's solar exposure compared to other cities in Luxembourg. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Luxembourg UVI	2	3	4	6	8	9	8	7	6	4	2	1
Mersch	2	3	4	6	8	9	8	8	6	4	2	1
Bettembourg UVI	2	3	4	6	8	9	8	8	6	4	2	1
Schifflange UVI	2	3	4	6	8	9	8	8	6	4	2	1
Dudelange UVI	2	3	4	6	8	9	8	8	6	4	2	1
Esch-sur-Alzette UVI	2	3	4	6	8	9	8	8	6	4	2	1