Last updated: July 2, 2025
Understanding the UV Index is crucial for residents and visitors in Rosslyn, Australia, where the sun can be both a source of warmth and a risk to skin health. As a Cfa climate zone, Rosslyn enjoys plenty of sunshine, but this also means that UV levels can spike, especially during midday. By monitoring the UV Index, particularly when it reaches levels of 6 or 7 from 11:00 AM to 1:00 PM, you can better protect yourself from sunburn and long-term skin damage. Staying informed is key to enjoying Rosslyn’s beautiful outdoors safely, while safeguarding your skin against harmful UV rays.
The UV Index reveals a dynamic day of sun exposure. Beginning at a gentle 1 at 7:00 AM and 8:00 AM, the index gradually rises, hitting 3 by 9:00 AM. A significant surge occurs at 10:00 AM, with the UV Index climbing to 5, peaking at an intense 7 at 12:00 PM. The intensity then begins to decline, with values of 6 at 1:00 PM, dropping to 4 by 2:00 PM, and further decreasing to 3 at 3:00 PM. As the afternoon wanes, the index returns to 1 by 4:00 PM and finally falls to 0 after 6:00 PM, marking a gentler evening. It's a reminder to stay sun-smart during those midday hours when UV exposure is at its highest!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 4 | 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 |
The UV Index shows significant seasonal variations, with the most hazardous levels occurring from January to April and during September to November, all categorizing as extreme with a burn time of just 10 minutes. Notably, February, November, and December consistently register an extreme UV Index of 15. As summer approaches, the risk decreases slightly with a very high index in May and August, where exposure times extend to 15 minutes, and further dips to a high level in June and July with a burn time of 25 minutes. Visitors and residents are strongly advised to take protective measures, especially during the high-risk months—wearing sunscreen, protective clothing, and seeking shade during peak hours to mitigate the risks of overexposure.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Melbourne UVI | 14 | 12 | 11 | 7 | 4 | 3 | 3 | 5 | 7 | 9 | 12 | 14 |
| Adelaide UVI | 14 | 13 | 12 | 8 | 5 | 3 | 4 | 5 | 7 | 10 | 12 | 15 |
| Sydney UVI | 14 | 13 | 11 | 8 | 5 | 3 | 4 | 6 | 8 | 10 | 12 | 14 |
| Perth UVI | 14 | 14 | 11 | 9 | 6 | 4 | 4 | 6 | 8 | 11 | 13 | 14 |
| Brisbane UVI | 15 | 15 | 13 | 10 | 7 | 5 | 5 | 8 | 9 | 12 | 14 | 15 |
| Rosslyn | 15 | 15 | 14 | 11 | 8 | 6 | 7 | 10 | 11 | 13 | 15 | 15 |