Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Paraiso, Costa Rica, where the combination of a warm Cfb climate and high altitudes can lead to significant sun exposure risks. With UV levels peaking at a staggering 15 around noon, being aware of these levels is vital for preventing sunburn and maintaining skin health. Whether you're hiking through stunning landscapes or soaking up the vibrant local culture, knowing when and how to protect your skin will ensure you enjoy all that Paraiso has to offer without the harmful effects of UV radiation.
As the day unfolds, the UV Index begins its climb, starting at a gentle 2 at 07:00. By 09:00, it reaches 9, signaling a more intense level of UV radiation. The sun fully asserts its strength by 11:00, peaking at an impressive 15. This maximum is maintained until 12:00, when the UV Index hovers at 15 before gradually tapering off in the afternoon. By 15:00, it drops to a moderate 5, and as the day cools, the index diminishes further, reaching 2 by 16:00 and dwindling to 0 by 19:00. It's a reminder to stay sun-safe during peak hours, especially between 10:00 and 14:00, when the intensity is at its highest!
Time | UVI | Category | Time to Burn |
---|---|---|---|
07:00 | 2 | low | 45 min |
08:00 | 5 | moderate | 30 min |
09:00 | 9 | very high | 15 min |
10:00 | 13 | extreme | 10 min |
11:00 | 15 | extreme | 10 min |
12:00 | 15 | extreme | 10 min |
13:00 | 12 | extreme | 10 min |
14:00 | 9 | very high | 15 min |
15:00 | 5 | 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, the UV Index remains extraordinarily high, with extreme exposure categories dominating from January to November. The months of March, April, and May mark the peak, with a UV Index reaching 16, indicating the highest risk for skin damage due to sun exposure. Visitors and residents should exercise caution, especially from January to May, where the risk of sunburn occurs within just 10 minutes of exposure. As a precaution, it’s essential to use broad-spectrum sunscreen, wear protective clothing, and seek shade during midday hours. Even as we transition into the cooler months, attention to UV safety remains crucial, as November and December still present a notable risk with indices of 12 and 11, respectively. Staying informed and protected is key to enjoying outdoor activities safely year-round.
UV Risk Categories
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Limon UVI | 12 | 13 | 14 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 11 | 10 |
Liberia UVI | 11 | 13 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 11 | 10 |
Alajuela UVI | 12 | 13 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 12 | 10 |
San Jose UVI | 12 | 14 | 15 | 16 | 14 | 14 | 14 | 14 | 14 | 15 | 12 | 11 |
Paraiso | 13 | 14 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 15 | 12 | 11 |