UV Index in Cluj-Napoca, Romania

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Cluj-Napoca, Romania, as it provides essential information about sun exposure and helps mitigate risks associated with harmful ultraviolet rays. With peak UV levels reaching 9 during midday hours in this Dfb climate zone, awareness is key to preventing sunburn and promoting skin health. By tracking the UV Index, Cluj-Napoca locals can better plan outdoor activities and protect themselves from the damaging effects of the sun. As the seasons shift, knowing when UV levels are highest can make a significant difference in maintaining long-term well-being under the Romanian sun.

Hourly UV Index in Cluj-Napoca

As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 07:00. By 08:00, it climbs to a 2, indicating a low risk of harm from unprotected sun exposure. However, from 09:00 onwards, the intensity builds, peaking at 9 between 13:00 and 14:00—a time when precautions are essential to protect skin from damage. The afternoon hours see a slight decrease, dropping to 8 at 15:00 and further declining to 4 by 17:00. As the sun sets, the UV Index falls back down to 1 by 19:00, marking a return to safer levels. Stay vigilant during those midday hours to enjoy the sunshine while keeping your skin healthy!

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:002low45 min
09:003moderate30 min
10:005moderate30 min
11:007high25 min
12:008very high15 min
13:009very high15 min
14:009very high15 min
15:008very high15 min
16:006high25 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Cluj-Napoca

Throughout the year, UV Index levels show significant seasonal changes, with high-risk months occurring from April to August. During these months, the UV Index peaks at 9, indicating a very high exposure category during June and July, where the burn time is only 15 minutes. Visitors and residents should take caution, especially in May, June, July, and August, when skin protection measures are essential, such as using sunscreen, wearing protective clothing, and seeking shade. As summer transitions to fall, UV levels gradually decrease; however, moderate exposure levels in April and October warrant continued awareness. The lowest UV indexes are found in January and December, categorizing them as low risk with longer burn times of 45 minutes, offering a reprieve from sun-related hazards.

Monthly Maximum UV Index for Cluj-Napoca, Romania

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Cluj-Napoca. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235689987432
Data source: Statistical UV Index data for Cluj-Napoca, 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 Cluj-Napoca UV Index with Other Romania Cities

The table above highlights how UV exposure in Cluj-Napoca compares to other major locations across Romania. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Cluj-Napoca's solar exposure compared to other cities in Romania. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Iasi UVI235689987432
Cluj-Napoca235689987432
Timisoara UVI235689987532
Bucharest UVI235789987532
Craiova UVI236789987532