Last updated: August 1, 2025
Awareness of the UV Index is crucial for residents of Darfield, New Zealand, as it directly impacts skin health and sunburn prevention. Understanding UV levels helps you make informed decisions about sun safety, especially during the warmer months when the sun can be particularly intense. With Darfield's Cfb climate, characterized by mild temperatures and moderate sunshine, UV exposure can still pose risks, necessitating vigilance even on seemingly mild days. Being mindful of daily UV fluctuations will empower you to enjoy the outdoors while protecting your skin from harmful effects.
The UV Index throughout the day reveals a gradual ascent as the sun climbs high in the sky. Starting at a maximum of 0 at 07:00, the index slowly advances to 1 from 08:00 to 10:00. By 11:00, it reaches 2, peaking at this level from 12:00 to 14:00, indicating a moderate risk for harm from unprotected sun exposure. As the afternoon wanes, the UV intensity begins to taper off, descending to 1 by 15:00 and then returning to 0 by 18:00. This hourly fluctuation emphasizes the importance of being sun-smart during those midday hours when the UV Index is at its peak.
| 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 | 2 | low | 45 min |
| 11:00 | 3 | moderate | 30 min |
| 12:00 | 4 | moderate | 30 min |
| 13:00 | 3 | moderate | 30 min |
| 14:00 | 3 | moderate | 30 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 |
Throughout the year, seasonal changes in the UV Index highlight periods of increased sun exposure risk. January and February** are high-risk months** with an extreme UV Index of 12-13, where a burn can occur in just 10 minutes. The intensity diminishes in March (UV Index 9) but remains very high, followed by a drop to high levels in April (UV Index 6). By May, the Index shifts to moderate (UV Index 3), offering some relief, and remains low during June and July (UV Index 2). However, caution is still advised as August and September see moderate UV levels (4-5). The risk resurfaces in October and November with very high indices (9-10), requiring caution once again for a burn within 15 minutes, and finally returns to extreme levels in December (UV Index 12). Visitors and residents should remain vigilant, especially during the high-risk months, and take protective measures such as sunscreen, clothing, and seeking shade during peak sun hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Christchurch UVI | 13 | 12 | 9 | 6 | 3 | 2 | 2 | 3 | 5 | 9 | 10 | 12 |
| Darfield | 13 | 12 | 9 | 6 | 3 | 2 | 2 | 4 | 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 |