Last updated: May 3, 2025
Understanding the UV Index is crucial for residents and visitors in Riverton, New Zealand, to safeguard their skin health and prevent sunburn. With a temperate Cfb climate that sees varying UV levels throughout the day, awareness of peak exposure times can make a significant difference in your outdoor activities. During midday hours, when the UV Index rises to 3, the risk of skin damage increases, especially for those engaging in prolonged sun exposure. By staying informed about UV levels, you can enjoy Riverton's beautiful scenery while protecting yourself from harmful effects of the sun.
The UV Index throughout the day showcases a gradual rise and fall in intensity. Starting at a cool 0 at 07:00, the index slowly climbs, reaching 1 by 08:00 and staying steady until 10:00. A noticeable upswing occurs around 11:00, peaking at 3 from 12:00 to 13:00, signaling the peak sun exposure hours. As the afternoon rolls in, the index dips back to 2 between 14:00 and 15:00, before declining again to 1 by 16:00. Finally, the day winds down with a return to 0 by 18:00, ensuring a safe evening for outdoor activities. Remember to protect your skin during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 1 | low | 45 min |
| 11:00 | 2 | low | 45 min |
| 12:00 | 3 | moderate | 30 min |
| 13:00 | 3 | moderate | 30 min |
| 14:00 | 2 | low | 45 min |
| 15:00 | 2 | low | 45 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 |
The UV Index exhibits significant seasonal variation, with the highest values occurring during the winter and late fall months. January and December are particularly concerning, both having an index of 12 and classified as extreme, with a burn time of just 10 minutes. Meanwhile, February and November also present high risks, with indices of 11 and 9, respectively, demanding similar caution. As spring approaches, the UV Index decreases, peaking at 8 in March and October, categorized as very high with a burn time of 15 minutes. By summer, the risk diminishes, with June and July classified as low, allowing for longer exposure times of 45 minutes. However, caution should still be taken in August and September, as the index returns to moderate levels at 3 and 5. Visitors and residents are advised to prioritize sun safety, especially from November to March, by wearing protective clothing, applying sunscreen frequently, and seeking shade during peak hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Riverton | 12 | 11 | 8 | 5 | 3 | 2 | 2 | 3 | 5 | 8 | 9 | 12 |
| Christchurch UVI | 13 | 12 | 9 | 6 | 3 | 2 | 2 | 3 | 5 | 9 | 10 | 12 |
| Wellington UVI | 13 | 13 | 9 | 7 | 4 | 2 | 2 | 4 | 6 | 9 | 10 | 13 |
| Hamilton UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |
| Manukau City UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |
| Auckland UVI | 14 | 14 | 10 | 7 | 4 | 3 | 3 | 5 | 7 | 10 | 11 | 13 |