Last updated: August 1, 2025
Understanding the UV Index is crucial for residents and visitors of Nogales, Mexico, a region known for its arid climate and high sun exposure. With UV levels soaring to a peak of 14 during midday, awareness of these levels is essential to protect against sunburn and long-term skin damage. As we embrace the sunny days typical of Nogales, knowing when the sun is at its strongest can help you make informed decisions to safeguard your skin health. Keep an eye on the UV Index to ensure your outdoor activities remain enjoyable and safe!
The UV Index for today showcases a dynamic journey through the hours, beginning from a calm start at 07:00 with a reading of 0. As the sun climbs higher, it reaches 1 by 08:00, before escalating to 2 at 09:00. The intensity really ramps up by 10:00, soaring to 4, and peaking at a blistering 14 by 14:00. The following hours witness a gradual decline, with the index at 12 at 15:00, then dropping to 10 by 16:00. As daylight begins to wane, the UV levels retreat further, landing at 4 by 18:00 and 2 at 19:00. It’s wise to stay protected during peak hours, particularly between 11:00 and 15:00, when the sun is most unforgiving.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 10 | very high | 15 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 13 | extreme | 10 min |
| 15:00 | 12 | extreme | 10 min |
| 16:00 | 10 | very high | 15 min |
| 17:00 | 6 | high | 25 min |
| 18:00 | 3 | moderate | 30 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, the UV Index experiences significant changes, peaking in the spring and summer months. From January to March, UV levels increase rapidly, reaching extreme levels in February and March (UV Index 11-12) with a burn time of just 10 minutes. April through July see consistent extreme UV Index values, reaching a high of 14 in April, May, and July. As summer transitions into early autumn, UV levels remain noticeably high, especially in August and September (UV Index 13), before gradually decreasing in October. The high-risk months for UV exposure are February, March, April, May, June, July, August, September, and October, each requiring extreme caution with a burn time of only 10 minutes. It is crucial for visitors and residents to take protective measures during these months, such as wearing sunscreen, protective clothing, and seeking shade during peak hours to prevent skin damage. In contrast, November and December offer some reprieve with lower UV levels, allowing for longer exposure times of 15 minutes and 25 minutes, respectively.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nogales | 8 | 11 | 12 | 14 | 14 | 13 | 14 | 13 | 13 | 11 | 9 | 7 |
| Guadalajara UVI | 9 | 11 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 9 | 8 |
| Iztapalapa UVI | 10 | 12 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |
| Ecatepec de Morelos UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Mexico City UVI | 10 | 12 | 14 | 15 | 15 | 14 | 14 | 13 | 14 | 12 | 10 | 8 |
| Puebla UVI | 10 | 12 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 10 | 9 |