Last updated: July 2, 2025
Understanding the UV Index in Onís, Spain, is crucial for maintaining skin health and preventing sunburn while enjoying the great outdoors. With its Cfb climate, Onís experiences a range of UV levels throughout the day, peaking at 10 between 14:00 and 15:00. This highlights the importance of being aware of UV exposure, especially during the sunny summer months, to protect yourself and your loved ones from potentially harmful effects. By keeping an eye on the UV Index, you can enjoy the stunning landscapes of Onís while safeguarding your skin from damage.
The UV Index throughout the day showcases a significant rise in intensity, peaking during the afternoon. Starting from a mild level of 1 at 7:00 AM and 8:00 AM, it steadily climbs and hits 3 by 10:00 AM. The sun's rays become more intense as the day progresses, reaching a noteworthy level of 7 at 12:00 PM. The highest values appear between 1:00 PM and 3:00 PM, where the UV Index reaches a maximum of 10, indicating a very high risk of harm from unprotected sun exposure. As the sun begins to dip, the index gradually declines, falling to 4 by 6:00 PM and resting at 2 by 7:00 PM. It's a vivid reminder to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 3 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 10 | very high | 15 min |
| 16:00 | 9 | very high | 15 min |
| 17:00 | 7 | high | 25 min |
| 18:00 | 4 | moderate | 30 min |
| 19:00 | 2 | low | 45 min |
Throughout the year, UV index levels vary significantly, indicating changing risks for sun exposure. January and December present low UV levels (Index 2), allowing for longer safe exposure times of 45 minutes. As the year progresses, February brings a moderate risk with an index of 4, reducing safe exposure to 30 minutes. The risk escalates in March (Index 6, 25 minutes) and peaks during the summer months of June (Index 11, 10 minutes) and July (Index 10, 15 minutes), which are considered high-risk periods. August and September maintain very high levels (Indices 9 and 8, respectively), followed by a gradual decline in October (Index 5, 30 minutes) and November (Index 3, 30 minutes). To protect against harmful UV rays, it is crucial for visitors and residents to take extra precautions during the high-risk months from March to September, including wearing sunscreen, protective clothing, and seeking shade during peak sun hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barcelona UVI | 3 | 4 | 5 | 7 | 8 | 10 | 10 | 9 | 7 | 6 | 3 | 2 |
| Onis | 2 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 5 | 3 | 2 |
| Zaragoza UVI | 3 | 4 | 6 | 8 | 9 | 11 | 11 | 9 | 8 | 6 | 3 | 2 |
| Valencia UVI | 3 | 4 | 6 | 8 | 9 | 11 | 10 | 9 | 8 | 6 | 4 | 3 |
| Madrid UVI | 3 | 4 | 6 | 8 | 10 | 11 | 11 | 9 | 8 | 6 | 4 | 3 |
| Sevilla UVI | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 4 | 3 |