Last updated: May 3, 2025
In Porthmadog, United Kingdom, staying informed about the UV Index is crucial for protecting your skin and overall health. Understanding UV levels helps you take proactive measures against sunburn and long-term skin damage, allowing you to fully enjoy the picturesque Welsh landscapes without risk. With a temperate maritime climate (Cfb) that often boasts sunny stretches, Porthmadog experiences varying UV exposure throughout the day. For instance, midday UV readings can peak at 7, indicating a significant risk of harm from unprotected sun exposure. So, whether you're exploring the stunning scenery or enjoying outdoor activities, knowing the UV Index is essential to safeguard your skin!
Throughout the day, the UV Index peaks at 12:00 PM with a noteworthy level of 7, indicating a high potential for harm from unprotected sun exposure. The intensity gradually rises from a mild 1 at 7:00 AM, reaching a moderate 4 by 10:00 AM. As the sun climbs higher, the index escalates to 5 at 11:00 AM, and maintains a robust 7 from 12:00 PM to 2:00 PM, signaling the need for sun safety precautions. After the afternoon peak, the index begins to taper off, descending to 6 at 3:00 PM, before easing to 3 by 5:00 PM and finally dwindling back to 1 by 7:00 PM. Stay protected during those peak hours for a safe and enjoyable day outdoors!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 5 | moderate | 30 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV Index values fluctuate significantly, indicating varying levels of sun exposure risk. The high-risk months are from May to August, where the UV Index reaches its peak at 7-8, classifying them as high to very high exposure. Specifically, June and July present the greatest risk, with a burn time of only 15 minutes. In contrast, the winter months (January, February, November, and December) show a low exposure category with UV Index values of 1-2, allowing for longer safe sun exposure (up to 45 minutes). To ensure safety, it is advisable for visitors and residents to take protective measures during the high UV months, such as wearing sunscreen, protective clothing, and seeking shade, especially during midday hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Liverpool UVI | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Sheffield UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |
| Porthmadog | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |
| Birmingham UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| London UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |
| Bristol UVI | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 6 | 4 | 2 | 1 |