Last updated: June 2, 2025
Understanding the UV Index is essential for residents and visitors in Callao, Peru, where the sun's intensity can pose significant risks to skin health. With typical UV exposure peaking around noon, when levels can reach 9—indicating a very high risk of harm from unprotected sun exposure—being aware of these fluctuations is vital for effective sunburn prevention. The semi-arid climate of Callao leads to bright sunshine and limited cloud cover, making it crucial to stay informed about UV levels. Protect your skin and enjoy your time outdoors safely by keeping an eye on the UV Index!
The UV index throughout the day exhibits a dynamic rise and fall, reflecting the sun's intensity. At 07:00, the index starts low at 1, gradually climbing to 2 by 08:00. By 09:00, it reaches a moderate 4, but excitement peaks at 12:00 with a striking 9, indicating a high risk for unprotected skin. The intensity tapers down after this noon pinnacle—falling to 8 at 13:00, then 6 at 14:00. As afternoon turns to evening, the index diminishes significantly, settling at 4 by 15:00, dropping to 2 at 16:00, and finally winding down to 1 by 17:00. As the sun sets, the index recedes completely, hitting 0 by 18:00, leaving a tranquil end to the day. Remember, during peak times, sun protection is crucial!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 1 | low | 45 min |
08:00 | 2 | low | 45 min |
09:00 | 4 | moderate | 30 min |
10:00 | 6 | high | 25 min |
11:00 | 8 | very high | 15 min |
12:00 | 9 | very high | 15 min |
13:00 | 8 | very high | 15 min |
14:00 | 6 | high | 25 min |
15:00 | 4 | moderate | 30 min |
16:00 | 2 | low | 45 min |
17:00 | 1 | low | 45 min |
18:00 | 0 | low | 45 min |
19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit significant seasonal variations, presenting high-risk months primarily between January and March, as well as August through November, where the index remains in the extreme category (14-12) with a burn time as brief as 10 minutes. Notably, April to July sees a slight decrease, transitioning to a very high level (10-9), allowing for slightly longer exposure times of 15 minutes. With such high UV readings during peak seasons, it is essential for visitors and residents alike to take precautionary measures: apply broad-spectrum sunscreen, wear protective clothing, and seek shade during peak sun hours to minimize the risk of skin damage.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Callao | 14 | 14 | 14 | 12 | 10 | 9 | 10 | 11 | 12 | 13 | 14 | 13 |
Lima UVI | 14 | 14 | 14 | 12 | 10 | 9 | 10 | 11 | 12 | 13 | 14 | 13 |
Trujillo UVI | 15 | 15 | 15 | 14 | 12 | 11 | 11 | 11 | 13 | 14 | 14 | 14 |
Chiclayo UVI | 14 | 15 | 15 | 14 | 13 | 11 | 11 | 12 | 15 | 14 | 14 | 13 |
Arequipa UVI | 18 | 17 | 17 | 15 | 12 | 10 | 11 | 13 | 15 | 17 | 18 | 17 |