Last updated: June 2, 2025
In Kasamwa, Tanzania, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Understanding UV levels can help residents and visitors alike prevent sunburn and promote long-term skin health, especially during the peak hours when the index reaches its highest levels at noon and early afternoon. Nestled in a tropical climate, Kasamwa experiences significant sun exposure, making it essential to stay informed about UV risks throughout the day. With the UV Index peaking at a dramatic 11 during midday, being proactive about sun safety is key to enjoying the beautiful outdoors without compromising your skin's well-being.
As the sun rises and warms the day, the UV Index begins at a mild 1 at 07:00 and 08:00, making it safe to venture outdoors without much protection. By 09:00, it jumps to a moderate 3, hinting at the increasing intensity. The real peak arrives between 11:00 and 13:00, where the index soars to an impressive 11, signifying a high risk of harm from unprotected sun exposure. As the afternoon rolls on, the index gradually dips, dropping to 10 at 14:00 and then descending through the late afternoon to 2 by 17:00. The sun sets the scene for a safe evening as the index returns to 1 at 18:00, finally resting at 0 by 19:00. This hourly dance of UV radiation highlights the importance of sun safety during those peak hours!
| 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 | 9 | very high | 15 min |
| 12:00 | 11 | extreme | 10 min |
| 13:00 | 11 | 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 varies little, consistently remaining in the extreme exposure category, particularly from January to April, where it peaks at 16 in March. This indicates a significant risk of harm from unprotected sun exposure, especially during these high-risk months. Even in late spring and summer, when the UV Index drops slightly, burn times remain dangerously low at just 10 minutes. Visitors and residents are strongly advised to take precautionary measures year-round, including wearing sunscreen, protective clothing, and seeking shade, particularly from January through April and during other months when UV levels are elevated. Always be mindful of your time in the sun to avoid skin damage.
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 |
| Kasamwa | 14 | 15 | 16 | 15 | 13 | 11 | 12 | 13 | 14 | 13 | 13 | 13 |
| 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 |