Last updated: June 2, 2025
Understanding the UV Index is crucial for residents and visitors in Onslow, Australia, where the arid BWh climate can lead to intense sun exposure. With peak UV levels reaching up to 7 in midday hours, being aware of these levels is essential for effective sunburn prevention and long-term skin health. As Onslow enjoys abundant sunshine, knowing when the UV Index is high empowers you to take necessary precautions and protect yourself from harmful rays. Whether you're enjoying outdoor activities or simply soaking up the sun, staying informed about UV levels can help safeguard your skin and enhance your time in this beautiful region.
The UV Index data for the day reveals a notable peak around noon, reaching a maximum of 7, indicating a high level of sun exposure. The morning begins with a mild index, starting at 1 at 07:00 and 08:00. By 09:00, it rises to 2, slowly climbing to 4 by 10:00. The intensity escalates significantly by 11:00 and hits its zenith at 12:00. After that, the UV levels gradually decline, dropping to 6 at 13:00 and 5 at 14:00, before falling to 3 by 15:00. As the evening approaches, the UV Index decreases rapidly, returning to 1 by 16:00 and reaching 0 by 18:00, signaling an end to the sun's harmful rays for the day. Remember to stay protected during those peak hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 2 | low | 45 min |
| 10:00 | 4 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 6 | high | 25 min |
| 14:00 | 5 | 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 |
Throughout the year, the UV Index demonstrates significant seasonal fluctuations, highlighting periods of extreme risk. From January to April, the UV Index peaks at a staggering 15, categorized as extreme, with a critical burn time of just 10 minutes. While levels drop slightly in May and June, they remain high, with May at 8 and June at 7 (very high and high exposure, respectively). As summer fades, the UV Index rises again to 13 in September and reaches 14 in October, while November and December maintain a constant 15. Given these conditions, visitors and residents should be particularly cautious from January through April and again in September to December, ensuring they take protective measures like sunscreen and proper clothing when outdoors, particularly during peak hours. Staying informed and vigilant can help prevent harmful UV exposure throughout the year.
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 |
| Onslow | 15 | 15 | 13 | 11 | 8 | 7 | 8 | 10 | 13 | 14 | 15 | 15 |