Last updated: May 3, 2025
Understanding the UV Index is crucial for residents of Walla Walla, Australia, as it plays a vital role in promoting skin health and preventing sunburn. With the region's Cfa climate bringing bright, sunny days, residents must be aware of fluctuating UV levels throughout the day. From a moderate index of 3 at 10:00 AM to a peak of 5 at noon, knowing when to take protective measures can greatly reduce the risk of skin damage. Stay informed and protect yourself as the sun shines brightly in Walla Walla!
The UV Index throughout the day follows a distinct pattern, with the intensity peaking at 12:00 PM when it reaches a noteworthy level of 5. Morning hours start off mild, with values of 1 at 07:00 and 08:00, gradually escalating to 2 by 09:00, then climbing to 4 at 11:00. Post-noon, the index slightly decreases, falling to 4 again at 13:00, before tapering off to 2 by 15:00. As the day winds down, the levels drop significantly, plunging to 0 by 19:00. This highlights the importance of sun protection during the midday hours when UV radiation is at its strongest.
| 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 | 3 | moderate | 30 min |
| 11:00 | 4 | moderate | 30 min |
| 12:00 | 5 | moderate | 30 min |
| 13:00 | 4 | moderate | 30 min |
| 14:00 | 3 | moderate | 30 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 |