Last updated: August 1, 2025
Understanding the UV Index in Castillos, Uruguay is essential for protecting your skin and promoting overall health. With its Cfa climate, residents and visitors alike face varying levels of UV exposure throughout the day. Knowing the UV levels can help you prevent sunburn and minimize the long-term risks associated with skin damage. Typically peaking at 4 around midday, it’s crucial to stay informed about UV Index readings to enjoy the sun safely and maintain your skin's well-being in this vibrant coastal town.
The UV Index throughout the day reveals a dynamic pattern of sun intensity. In the morning, it starts off low, peaking at 1 by 09:00. As the sun climbs higher, we see a steady increase with the index reaching 3 by 11:00. The highest point occurs from 12:00 to 13:00, where the UV Index hits a robust 4, indicating a need for sun protection during those hours. Following this peak, the index gradually declines, returning to 2 at 15:00, and then dropping back down to 0 by 18:00, marking the end of significant UV exposure for the day. Plan your outdoor activities accordingly to stay safe under the sun!
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 | 6 | high | 25 min |
13:00 | 5 | moderate | 30 min |
14:00 | 5 | moderate | 30 min |
15:00 | 3 | moderate | 30 min |
16:00 | 2 | low | 45 min |
17:00 | 1 | low | 45 min |
18:00 | 1 | low | 45 min |
19:00 | 0 | low | 45 min |
Throughout the year, UV Index values exhibit significant seasonal fluctuations, with the highest readings occurring from January to March and October to December. These months are categorized as having an extreme exposure level, with a rapid burn time of just 10 minutes, posing substantial risks for skin damage. Conversely, from April to August, the UV Index decreases, transitioning to high and moderate levels, allowing for longer exposure times of 25 to 30 minutes before burning occurs. Notably, September presents a spike back to a very high index. Given these trends, it is advisable for visitors and residents to exercise increased caution during high-risk months (particularly January, February, March, October, November, and December) by wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak hours.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Las Piedras UVI | 14 | 13 | 11 | 7 | 5 | 3 | 4 | 6 | 8 | 10 | 13 | 14 |
Montevideo UVI | 14 | 13 | 11 | 7 | 5 | 3 | 4 | 6 | 8 | 10 | 13 | 14 |
Castillos | 14 | 13 | 11 | 7 | 5 | 4 | 4 | 6 | 8 | 11 | 13 | 14 |
Paysandu UVI | 15 | 13 | 11 | 8 | 5 | 4 | 4 | 6 | 8 | 11 | 13 | 14 |
Salto UVI | 15 | 13 | 12 | 8 | 5 | 4 | 5 | 6 | 9 | 11 | 13 | 14 |
Rivera UVI | 15 | 14 | 12 | 9 | 5 | 4 | 5 | 7 | 9 | 12 | 14 | 15 |