Last updated: July 2, 2025
In Walla Walla, Australia, awareness of the UV Index is crucial for maintaining skin health and preventing sunburn. With the typical Cfa climate bringing warm summers and mild winters, understanding daily UV levels can significantly impact your outdoor activities and long-term skin protection. During peak hours, UV Index levels can reach a maximum of 3, highlighting the need for precaution, especially for those spending extended time outdoors. Stay informed and safeguard your skin by monitoring the UV Index — your future self will thank you!
The UV Index throughout the day offers a clear insight into solar intensity, peaking at 3 between 11:00 AM and 1:00 PM, signaling moderate sun exposure. The day begins with 0 UV at 7:00 AM, gradually rising to 1 by 8:00 AM and maintaining a low level until 10:00 AM. As the sun climbs higher, the index reaches 2 by mid-morning and then stabilizes at 3 during the lunch hours, suggesting the need for sun protection. By mid-afternoon, numbers dip back to 2 and diminish further to 1 as the evening approaches. Finally, the UV Index returns to 0 after 6:00 PM, marking a transition into a safer time to enjoy the outdoors without risk of sunburn.
| 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 | 2 | 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 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 |