Last updated: July 2, 2025
Understanding the UV Index in Guarapuava, Brazil, is crucial for maintaining skin health and preventing sunburn. With a climate classified as Cfa, which features warm summers and mild winters, residents and visitors alike must be aware of daily UV levels to protect themselves effectively. During peak hours, especially between 10 AM and 2 PM, the UV Index can rise to 6, indicating moderate to high exposure risk. By keeping an eye on the UV Index, you can take appropriate precautions—like wearing sunscreen, hats, or seeking shade—to enjoy the beauty of Guarapuava while safeguarding your skin from harmful UV rays.
The UV Index throughout the day tells a compelling story of sun exposure. Starting at a cool 0 at 07:00, the intensity slowly increases, reaching 1 by 08:00 and progressing to 2 at 09:00. The sun moves higher in the sky, and by 10:00, the index climbs to 4, peaking at 6 between 12:00 and 13:00—a clear indication to wear sunscreen and seek shade. After 13:00, the index begins its gentle descent, dropping to 5 at 14:00 and further down to 3 by 15:00. The day's UV activity wanes, going to 2 at 16:00 and back to 1 by 17:00, before returning to a safe 0 from 18:00 onward. Make sure to enjoy the sun thoughtfully during its peak hours!
| 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 | 5 | moderate | 30 min |
| 12:00 | 6 | high | 25 min |
| 13:00 | 6 | high | 25 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 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index in this region exhibits significant seasonal changes, with the highest levels occurring from January to March and during September and October. The months of January, February, November, and December experience an extreme UV Index of 15, with a dangerously short burn time of just 10 minutes. March and April also remain critical months with UV levels of 13 and 11 respectively. The warmer months of May to August see a decline in intensity but still pose risks, particularly in May and August, where the exposure is classified as very high with a burn time of 15 minutes. Visitors and residents are strongly advised to take precautions year-round, especially between January and April and again in September and October, by applying broad-spectrum sunscreen, wearing protective clothing, and limiting sun exposure during peak hours to reduce the risk of harmful UV effects.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rio de Janeiro UVI | 15 | 14 | 13 | 10 | 7 | 6 | 7 | 9 | 11 | 12 | 13 | 15 |
| Sao Paulo UVI | 16 | 15 | 12 | 11 | 8 | 6 | 7 | 9 | 11 | 13 | 14 | 15 |
| Guarapuava | 15 | 15 | 13 | 11 | 8 | 6 | 6 | 9 | 11 | 14 | 15 | 15 |
| Belo Horizonte UVI | 17 | 16 | 14 | 12 | 9 | 7 | 8 | 10 | 12 | 13 | 14 | 16 |
| Salvador UVI | 14 | 14 | 14 | 13 | 10 | 9 | 9 | 12 | 12 | 15 | 15 | 14 |
| Fortaleza UVI | 14 | 14 | 15 | 15 | 13 | 11 | 11 | 12 | 13 | 13 | 13 | 13 |