UV Index in Celje, Slovenia

Last updated: June 2, 2025

Awareness of the UV Index is crucial for residents and visitors in Celje, Slovenia, as understanding UV levels can significantly impact skin health and sunburn prevention. With a temperate climate characterized by warm summers and ample sunlight, Celje experiences varying UV exposure throughout the day. For instance, peak UV levels can reach a striking 9 around midday, highlighting the importance of protective measures during these hours. By staying informed about the UV Index, you can enjoy the sunshine safely while safeguarding your skin against harmful rays.

Hourly UV Index in Celje

The UV Index today presents a notable climb as the sun ascends, peaking at 9 around noon and early afternoon, signaling very high sun exposure risk. Starting gently at 1 by 7 AM, the index rises steadily, reaching 6 by 10 AM and then surging to its maximum of 9 between 12 PM and 1 PM. Early afternoon brings a slight decline to 8 at 2 PM, followed by a gradual decrease through the later hours, settling back to 1 by 7 PM. With this trajectory, it's crucial to take precautions during the peak hours of 11 AM to 1 PM, ensuring skin protection against harmful UV rays. Stay safe and enjoy the sun wisely!

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

Monthly UV Index Trends in Celje

During the year, UV index levels fluctuate significantly, indicating varying risks for skin damage from sun exposure. The low-risk months are January, December (UV Index 2), and November, February, October (UV Index 3), where exposure is generally safe with longer burn times of 30-45 minutes. As the season progresses into March and April (UV Index 5-6), caution is advised as burn times decrease to 25-30 minutes. The high-risk months, notably May through August (UV Index 8-9), present very high UV exposure, with burn times shortening dramatically to just 15 minutes. In September, risk lowers slightly (UV Index 6) but remains significant with a burn time of 25 minutes. Visitors and residents are strongly encouraged to protect their skin, especially during peak UV months, by wearing sunscreen, protective clothing, and seeking shade whenever possible to minimize potential harm.

Monthly Maximum UV Index for Celje, Slovenia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Celje. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235789986422
Data source: Statistical UV Index data for Celje, 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 Celje UV Index with Other Slovenia Cities

The table above highlights how UV exposure in Celje compares to other major locations across Slovenia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Celje's solar exposure compared to other cities in Slovenia. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maribor UVI235689986432
Celje235689986432
Velenje UVI235689986432
Kranj UVI235689987432
Ljubljana UVI235689987532