Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Hihifo, Tonga, where the sun's intensity can pose significant risks to skin health. As temperatures rise in this tropical climate, awareness of UV levels helps in preventing sunburn and long-term skin damage. With the UV Index reaching a peak of 9 during midday hours, it’s essential to take preventive measures against overexposure. By staying informed about the daily UV index, you can enjoy the beautiful Tongan sunshine while protecting your skin from harmful rays.
The UV Index throughout the day showcases a distinct peak during midday hours, brilliantly illustrating the sun's intensity. Starting off gently at 1 at 07:00 and 08:00, the index gradually climbs, reaching a moderate 2 by 09:00. However, as the clock strikes 10:00, the intensity escalates dramatically to 5, followed by a striking 7 at 11:00. The sun's relentless rays culminate at 12:00 and 13:00, where it hits its zenith with a remarkable 9. A slight decrease follows, as the index settles at 8 by 14:00, and then gradually tapers off to 5 at 15:00, before sinking to 3 by 16:00. As evening approaches, the UV Index dwindles back to 1 at both 17:00 and 18:00, ultimately reaching a low of 0 by 19:00. Be cautious during those peak hours; your skin's safety is paramount!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 9 | very high | 15 min |
| 14:00 | 8 | very high | 15 min |
| 15:00 | 5 | moderate | 30 min |
| 16:00 | 3 | moderate | 30 min |
| 17:00 | 1 | low | 45 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 0 | low | 45 min |
Throughout the year, UV Index levels fluctuate significantly, with the highest risk occurring during the winter and early spring months. From January to May, the UV Index remains in the extreme category, peaking at 16, with a minimal burn time of just 10 minutes. The summer months, particularly June and July, see a slight decrease; the UV Index falls to 8 and 9, categorized as very high, with a burn time increasing to 15 minutes. As we transition back into late summer and autumn, the UV Index again escalates to extreme levels in August through November, with values ranging from 12 to 15 and burn times reverting to 10 minutes. Visitors and residents are strongly advised to take necessary precautions during high-risk months, particularly from January to May and again in August to November, by applying sunscreen, wearing protective clothing, and limiting sun exposure during peak hours to ensure safety against harmful UV radiation.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tatakamotonga UVI | 16 | 15 | 14 | 11 | 9 | 7 | 8 | 10 | 11 | 13 | 15 | 16 |
| Haveluloto UVI | 16 | 15 | 14 | 11 | 9 | 7 | 8 | 10 | 11 | 13 | 15 | 16 |
| Lapaha UVI | 16 | 15 | 14 | 11 | 9 | 7 | 8 | 10 | 11 | 13 | 15 | 16 |
| Nuku'alofa UVI | 16 | 15 | 14 | 11 | 9 | 7 | 8 | 10 | 11 | 13 | 15 | 16 |
| Neiafu UVI | 16 | 16 | 15 | 12 | 9 | 7 | 8 | 11 | 12 | 14 | 15 | 16 |
| Hihifo | 16 | 16 | 15 | 13 | 11 | 8 | 9 | 12 | 13 | 14 | 15 | 15 |