Last updated: July 2, 2025
Staying informed about the UV Index in Cromwell, New Zealand, is crucial for protecting your skin and overall health. Understanding UV levels helps you prevent sunburn and other skin-related issues, ensuring that your outdoor activities remain enjoyable and safe. Given Cromwell's Cfb climate, characterized by mild conditions but with notable UV exposure risks, it's important to be aware of daily fluctuations. With peak UV Index levels reaching 2 around noon, even on seemingly mild days, taking precautionary measures is essential for maintaining your skin's long-term health. Always check the UV Index before heading out to bask in the sun!
The UV Index data reveals a gradual increase in sun intensity throughout the morning, starting from a safe 0 at 07:00 and 08:00. As the day progresses, the index reaches its peak of 2 during midday, specifically at 11:00, 12:00, 13:00, and 14:00—a time when sun protection is advisable. After this peak, the UV levels gently decline to 1 by 15:00 and remain steady until 17:00, before dropping back to 0 in the evening hours at 18:00 and 19:00. This data underscores the importance of being sun-smart during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 0 | low | 45 min |
| 08:00 | 0 | low | 45 min |
| 09:00 | 1 | low | 45 min |
| 10:00 | 1 | low | 45 min |
| 11:00 | 2 | low | 45 min |
| 12:00 | 2 | low | 45 min |
| 13:00 | 2 | low | 45 min |
| 14:00 | 2 | low | 45 min |
| 15:00 | 1 | 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 levels occurring in the winter and late fall months. Notably, January and December showcase an extreme exposure category (UV Index 13), with a burn time of just 10 minutes. February and November also pose high risks at a UV Index of 12 and 10 respectively, categorized as extreme and very high. The risk moderates slightly in the spring, peaking in March at 9 (very high) and tapering off by May. June and July see lower indices (2, low exposure) but increase again in August and September. Given these fluctuations, it is crucial for visitors and residents to take proactive measures, particularly from January to February and October to November, by applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak sun hours to minimize the risk of harmful UV exposure.
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 |
| Cromwell | 13 | 12 | 9 | 6 | 3 | 2 | 2 | 4 | 5 | 9 | 10 | 13 |
| 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 |