Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Poli, Tanzania, where the climate offers beautiful, sunny days but also poses significant risks for skin health. By staying informed about UV levels, you can effectively prevent sunburn and long-term skin damage, particularly during the peak hours of 11 AM to 1 PM, when the index reaches a high of 12. In this Cwb climate zone, typical daily exposure can fluctuate significantly, emphasizing the importance of protective measures as UV levels jump from a low 1 early in the morning to extremes of 10 and 12 during midday. Prioritizing UV awareness is essential for enjoying the vibrant outdoor lifestyle while safeguarding your skin's health.
The UV Index today showcases a dynamic rise and fall throughout the hours. Starting the morning at a modest 1 at both 07:00 and 08:00, it gradually intensifies, peaking at a striking 12 between 12:00 and 13:00—a clear signal for sun protection. Early afternoon brings a slight decline to 10 at 14:00, followed by a gentle drop to 7 by 15:00. As the day winds down, the index dips swiftly to 4 at 16:00, before settling back to 1 by 18:00 and finally reaching a 0 at 19:00. As the sun makes its ascent and descent, it's crucial to stay aware of these UV fluctuations to protect your skin!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 6 | high | 25 min |
| 11:00 | 10 | very high | 15 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 10 | very high | 15 min |
| 15:00 | 7 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 2 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, the UV Index consistently remains at extreme levels, highlighting a significant risk for sunburn. January to April sees the highest UV Index readings, ranging from 15 to 16, indicating that residents and visitors should take extra precautions when exposed to sunlight, as burn time is as little as 10 minutes. The risk remains high in May and June with values of 14 and 12, respectively, before slightly decreasing through the summer months of July and August. September to November returns to UV Index levels around 13 to 14, and finally, December sees a slight drop to 14, yet maintains the extreme exposure category. It is crucial for everyone to apply sunscreen, wear protective clothing, and limit sun exposure during all months, especially from January through April when the risk is paramount.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zanzibar UVI | 14 | 14 | 14 | 14 | 12 | 10 | 10 | 12 | 13 | 13 | 13 | 13 |
| Dar es Salaam UVI | 14 | 14 | 15 | 14 | 12 | 10 | 10 | 12 | 13 | 13 | 13 | 13 |
| Mwanza UVI | 14 | 15 | 16 | 15 | 13 | 11 | 11 | 13 | 14 | 13 | 13 | 13 |
| Poli | 15 | 16 | 16 | 16 | 14 | 12 | 12 | 13 | 14 | 14 | 13 | 14 |
| Arusha UVI | 15 | 16 | 16 | 16 | 14 | 12 | 12 | 13 | 14 | 14 | 13 | 14 |
| Mbeya UVI | 16 | 16 | 16 | 16 | 13 | 11 | 11 | 13 | 14 | 14 | 14 | 15 |