Last updated: May 3, 2025
Understanding the UV Index in Perth, Canada is essential for safeguarding your skin and overall health. With the potential for high UV levels, particularly from late morning to early afternoon, being aware of UV exposure can help prevent sunburn and long-term skin damage. Perth experiences a Dfb climate, which means warm summers and significant sunlight, making it crucial for residents to monitor UV levels regularly. By staying informed, you can enjoy the outdoors safely while protecting your skin from harmful rays.
The UV Index rises steadily throughout the morning, with a low of 1 at 07:00, gradually climbing to 9 between 12:00 and 13:00, marking the peak of sun intensity. As the afternoon progresses, the index begins to decline, dropping to 8 at 14:00 and further easing to 7 by 15:00. As the sun sets, the UV Index continues to decrease, landing back at a mild 1 by 19:00. This data highlights the importance of protective measures during peak hours, especially between 11:00 and 13:00, when sun exposure poses the highest risk.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 3 | moderate | 30 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 | 7 | high | 25 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
As the seasons change, so do the UV index levels, reflecting varying risks of sun exposure throughout the year. Late spring and summer present the highest UV indices, peaking at 9 from May to July, categorized as very high, with a burn time of just 15 minutes. This indicates that April through August are the critical months to be vigilant about sun protection, especially for those engaging in outdoor activities. Conversely, the UV index is at its lowest in January and December, where it drops to 2 with a low exposure category and a burn time of 45 minutes. Visitors and residents should prioritize sun safety during the high-risk months—consider wearing protective clothing, applying sunscreen regularly, and seeking shade during peak sunlight hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Edmonton UVI | 2 | 3 | 5 | 6 | 7 | 7 | 8 | 7 | 6 | 4 | 2 | 1 |
| Calgary UVI | 2 | 3 | 4 | 6 | 8 | 8 | 9 | 8 | 7 | 4 | 2 | 1 |
| Montreal UVI | 2 | 4 | 5 | 7 | 9 | 9 | 8 | 8 | 7 | 5 | 3 | 2 |
| Ottawa UVI | 2 | 4 | 5 | 8 | 9 | 9 | 8 | 8 | 7 | 5 | 3 | 2 |
| Perth | 2 | 4 | 5 | 8 | 9 | 9 | 9 | 8 | 7 | 5 | 3 | 2 |
| Toronto UVI | 2 | 4 | 5 | 8 | 9 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |