UV Index in Ruhnu, Estonia

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Ruhnu, Estonia, a beautiful island known for its stunning landscapes and outdoor activities. With UV levels peaking at 7 between 1 PM and 3 PM, being aware of these readings can help protect against sunburn and promote long-term skin health. The temperate climate of Ruhnu, classified as Dfb, can create varying UV exposure risks depending on the season and time of day, making it essential to stay informed. By keeping an eye on the UV Index, you can enjoy Ruhnu's sunlit shores while keeping your skin safe and healthy!

Hourly UV Index in Ruhnu

From 7:00 AM to 8:00 AM, the UV Index starts at a low 1, indicating minimal risk of harm from unprotected sun exposure. As the day progresses, the numbers rise steadily, peaking at 7 around 1:00 PM and 2:00 PM, where the danger increases to moderate, advocating for sun protection measures. The UV Index then gradually declines, dropping to 4 by 5:00 PM and further to 2 by the evening hours of 6:00 PM through 7:00 PM. This data highlights the importance of sun safety, especially during the midday hours when the UV rays are at their strongest. Remember, protecting your skin is essential when the UV Index hits that high mark!

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
10:004moderate30 min
11:005moderate30 min
12:006high25 min
13:007high25 min
14:007high25 min
15:006high25 min
16:005moderate30 min
17:004moderate30 min
18:002low45 min
19:002low45 min

Monthly UV Index Trends in Ruhnu

Throughout the year, UV exposure varies significantly, with notable seasonal changes impacting both residents and visitors. From January to February, the UV Index remains low (1-2), allowing for a burn time of 45 minutes, making skin protection less critical. March and April see a moderate rise (UV Index 3-4) with a reduced burn time of 30 minutes, suggesting that some protective measures are advisable during outdoor activities. The risk peaks in the high-risk months of May through August, where the UV Index reaches between 6 and 7, and burn time drops to just 25 minutes—strongly advising the use of sunscreen, protective clothing, and hats. As the year transitions into September with a moderate UV Index (4), and then back to low levels from October to December (1-2), residents should be reminded that vigilance is key during these warmer months to avoid skin damage while enjoying the outdoors.

Monthly Maximum UV Index for Ruhnu, Estonia

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Ruhnu. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec123567764211
Data source: Statistical UV Index data for Ruhnu, 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 Ruhnu UV Index with Other Estonia Cities

The table above highlights how UV exposure in Ruhnu compares to other major locations across Estonia. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Ruhnu's solar exposure compared to other cities in Estonia. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Tallinn UVI113457754211
Kohtla-Jaerve UVI113457764211
Narva UVI123457764211
Paernu UVI123457764211
Tartu UVI123457764211
Ruhnu123467764211