Last updated: July 2, 2025
Understanding the UV Index is essential for residents of Koroit, Australia. This vital gauge of ultraviolet radiation helps you protect your skin from harmful sunburn and long-term health issues. Given Koroit's Cfb climate, characterized by moderate temperatures and pleasant conditions, awareness of the UV levels—ranging from minimal exposure in the morning to moderate levels during midday—can help you make informed decisions about sun protection. Knowing when to seek shade or apply sunscreen can significantly enhance your skin health and overall well-being, especially during those hours when UV exposure peaks.
At 07:00, the UV Index starts off at a comfortable 0, indicating safe outdoor conditions. As the sun rises, it gently climbs to 1 by 08:00 and remains steady until 09:00. By 10:00, a slight increase to 2 suggests it’s time to put on some sunscreen, especially as it peaks at 3 between 12:00 and 13:00. The afternoon sees a dip back to 2 from 14:00 to 15:00, before gradually lowering to 1 by 16:00. As the day winds down, the index returns to 0 around 18:00 and remains there until 19:00, offering a safe end to the day’s outdoor activities. Make sure to protect yourself during those midday hours when the sun is at its most intense!
| 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 | 2 | low | 45 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 demonstrates significant seasonal fluctuations, peaking in January and December with an extreme exposure category of 13 and 14, respectively, and a critical burn time of just 10 minutes. February and March also experience high levels of UV exposure, maintaining an index of 12 and 11, respectively. As spring arrives in April with a UV Index of 7 (high) and burn time of 25 minutes, the risk begins to decrease but remains notable. The summer months of June and July show a moderate UV level of 3, extending burn time to 30 minutes, while August sees a slight increase to 4. However, the risk surges again in September and October, where the UV Index reaches 7 (high) and 9 (very high), with burn times of 25 and 15 minutes, respectively. November also returns to extreme levels with an index of 11. Given these patterns, both visitors and residents should be particularly cautious from November to March and during early spring and fall, taking essential sun protection measures such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Koroit | 13 | 12 | 11 | 7 | 4 | 3 | 3 | 4 | 7 | 9 | 11 | 14 |
| 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 |