Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Antsiranana, Madagascar, where the climate's tropical characteristics can lead to elevated UV exposure. With UV levels peaking at 9 during midday, awareness of these fluctuations is essential for preventing sunburn and protecting skin health. As you enjoy the vibrant surroundings of this beautiful region, being mindful of the UV index helps ensure that your outdoor adventures are safe and enjoyable, reducing risks associated with overexposure to harmful rays. Explore Antsiranana's stunning landscape, but don’t forget to stay informed about those important UV levels!
The UV Index throughout the day reveals a pronounced peak in sunlight intensity, especially between 11:00 AM and 1:00 PM, where it reaches a maximum of 9. This indicates the highest risk of harm from unprotected sun exposure during these hours. Starting from 8:00 AM, the index climbs steadily, highlighting the importance of sun safety measures as it reaches 5 at 9:00 AM and escalates to 7 by 10:00 AM. As the afternoon progresses, a noticeable decline occurs with values dropping to 5 at 2:00 PM and further falling to 3 by 3:00 PM, before tapering off to 1 by late afternoon. By 6:00 PM, the UV Index diminishes to 0, signifying safe conditions for outdoor activities. Remember to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 3 | moderate | 30 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 7 | high | 25 min |
| 11:00 | 9 | very high | 15 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 8 | very high | 15 min |
| 14:00 | 5 | moderate | 30 min |
| 15:00 | 3 | moderate | 30 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels exhibit significant variability, with extreme ratings observed from January to May, where the UV Index consistently reaches 16 and burn time is as short as 10 minutes. The high-risk months are marked by January, February, March, and April, requiring both residents and visitors to adopt stringent sun protection measures. May also shows a notable UV Index of 11. As summer approaches, the UV Index decreases slightly but remains classified as very high in June and July with a burn time of 15 minutes. Come August, the index spikes back to 12 amidst the extreme exposure category. As the year winds down, September through November return to 14, again necessitating vigilance, and December closes the year with a 15. It's crucial for everyone to wear sunscreen, protective clothing, and seek shade during peak hours, especially in these high-risk months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Toamasina UVI | 16 | 16 | 15 | 12 | 9 | 7 | 8 | 10 | 12 | 12 | 13 | 15 |
| Fianarantsoa UVI | 17 | 17 | 15 | 12 | 9 | 7 | 8 | 10 | 12 | 13 | 14 | 16 |
| Mahajanga UVI | 16 | 16 | 15 | 13 | 10 | 8 | 9 | 11 | 12 | 12 | 13 | 15 |
| Antananarivo UVI | 17 | 17 | 15 | 12 | 10 | 8 | 9 | 11 | 13 | 13 | 14 | 16 |
| Antsirabe UVI | 17 | 17 | 16 | 13 | 10 | 8 | 9 | 11 | 13 | 13 | 14 | 16 |
| Antsiranana | 16 | 16 | 16 | 14 | 11 | 9 | 10 | 12 | 14 | 14 | 14 | 15 |