Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors of Granjenal, Mexico, as it provides vital information about the sun's intensity and potential risks. High UV levels can lead to severe sunburn, increase the risk of skin damage, and contribute to long-term health issues such as skin cancer. Given Granjenal's semi-arid BSh climate, where UV exposure can soar, particularly between 11 AM and 2 PM, being aware of the UV Index is essential for protecting your skin and ensuring enjoyable outdoor experiences. Stay informed and take necessary precautions to enjoy the sun safely!
As the sun rises, the UV Index starts off gently, peaking at 1 by 08:00. However, as the day progresses, the intensity ramps up significantly. By 10:00, the index reaches 5, but the real heat kicks in at 12:00, soaring to an intense 11. The peak occurs at 14:00, where it hits a blistering 14—a clear signal to seek shade and protect your skin. After this, the index begins to drop, settling at 12 by 15:00 and gradually descending to 3 by 18:00. As twilight approaches, the UV levels ease back to 1 by 19:00, marking a dramatic contrast to the midday sun's peak. Stay vigilant and wear sun protection during these critical 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 | 5 | moderate | 30 min |
11:00 | 8 | very high | 15 min |
12:00 | 11 | extreme | 10 min |
13:00 | 13 | extreme | 10 min |
14:00 | 14 | extreme | 10 min |
15:00 | 12 | extreme | 10 min |
16:00 | 9 | 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, seasonal UV changes indicate significant variability in exposure risk. The high-risk months are from March to October, where the UV Index reaches extreme levels, peaking at 14 in both May and July, with burn times of just 10 minutes. January and February also present high risks with very high ratings of 8 and 10, but burn times extend to 15 minutes. As the year progresses, UV exposure diminishes in November (UV Index 9) and December (UV Index 7), where the burn time increases to 15 minutes and 25 minutes, respectively. Visitors and residents are advised to take precautionary measures during the high-risk months by wearing protective clothing, applying sunscreen, and seeking shade when outdoors, especially during midday hours when the sun's rays are most intense.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Granjenal | 8 | 10 | 13 | 13 | 14 | 13 | 14 | 13 | 13 | 12 | 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 |