Last updated: June 2, 2025
Understanding the UV Index is crucial for residents of Walla Walla, Australia, where the subtropical climate can lead to significant sun exposure throughout the year. Being aware of UV levels helps in preventing sunburn and maintaining skin health, making it essential for safe outdoor activities. With peak UV Index readings reaching up to 3 during midday hours, Walla Walla's climate presents specific risks, especially in the summer months. Stay informed to protect yourself and enjoy the beautiful Australian sun responsibly!
The UV Index throughout the day showcases a dynamic range of sunlight intensity, starting from a maximum of 3 between 11:00 AM and 1:00 PM. Early risers will encounter minimal exposure at 07:00 with a value of 0 before it gradually rises to 1 by 08:00 and 09:00. By 10:00, the index reaches 2, indicating a moderate level of UV radiation, and peaks at 3 during the late morning to early afternoon. As the sun begins its descent, the index declines, dropping back to 2 by 14:00 before tapering off to 1 from 15:00 until 17:00, and finally returning to 0 by 18:00. Overall, this UVI data suggests a cautious approach to sun exposure during peak hours, especially from 11:00 AM to 1:00 PM, when sunscreen and protective clothing are advisable.
| 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 | 3 | moderate | 30 min |
| 13:00 | 3 | moderate | 30 min |
| 14:00 | 2 | low | 45 min |
| 15:00 | 1 | low | 45 min |
| 16:00 | 1 | low | 45 min |
| 17:00 | 0 | low | 45 min |
| 18:00 | 0 | low | 45 min |
| 19:00 | 0 | low | 45 min |
The UV Index varies significantly throughout the year, with the highest levels occurring during the winter months of January and February (UV Index 14), classified as extreme, where even short exposure can lead to sunburn in just 10 minutes. A similarly high index is observed in November (UV Index 12) and December (UV Index 14). As spring approaches, March maintains an extreme level (UV Index 12), while April drops slightly to very high (UV Index 8), allowing for a bit more exposure time at 15 minutes. Summer months see a decrease in UV levels, with June and July maintaining a moderate UV Index of 3, requiring around 30 minutes of exposure before risking a burn. As autumn arrives, the UV Index rises to 7 in September (high) before dropping again in October (very high, UV Index 10). During these times, it's crucial for both visitors and residents to take precautions, especially from November to March, ensuring proper sun protection such as sunscreen, hats, and sunglasses to safeguard against harmful UV radiation.
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 |
| Walla Walla | 14 | 13 | 12 | 8 | 5 | 3 | 3 | 5 | 7 | 10 | 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 |