Last updated: July 2, 2025
Understanding the UV Index is crucial for residents of Bol'shaya Ryazan', Russian Federation, where the weather falls under the Dfb climate zone. The sun can be deceiving; even during mild summer days, UV levels peak around midday, reaching a maximum of 7 between 12:00 and 14:00, posing significant risks such as sunburn and long-term skin health issues. By being aware of the UV index, you can better protect yourself and your loved ones from harmful effects, ensuring you enjoy the sunny days while taking the necessary precautions against overexposure.
As the sun rises, the UV Index begins its ascent, starting at a mild 1 at 7:00 AM. By 8:00 AM, it increases to 2, signaling a gentle reminder to start taking sun protection seriously. The intensity picks up dramatically at 9:00 AM, reaching 4. The peak UV exposure occurs from 11:00 AM to 1:00 PM, where the index hits 6 and then soars to 7 – a crucial time to seek shade and apply sunscreen. As the afternoon progresses, UV levels gradually decline, dipping to 6 at 3:00 PM and falling further to 2 by 6:00 PM. Finally, the day winds down with a resting 1 at 7:00 PM, making it clear that awareness of UV exposure is vital throughout the day.
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 4 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 6 | high | 25 min |
| 12:00 | 7 | high | 25 min |
| 13:00 | 7 | high | 25 min |
| 14:00 | 7 | high | 25 min |
| 15:00 | 6 | high | 25 min |
| 16:00 | 4 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
The UV Index experiences significant seasonal variation, with high-risk months identified primarily from May to August, where the index peaks at 8 in June and remains at 7 in both July and August, indicating a very high to high exposure category. During these months, burn times shorten dramatically to as little as 15-25 minutes, necessitating increased caution. In contrast, the winter months (January, February, November, and December) exhibit a low UV Index (1-2), allowing for prolonged exposure of up to 45 minutes without the risk of burn. To ensure safety, it is advisable for visitors and residents to protect their skin with sunscreen, hats, and protective clothing during the moderate to very high UV Index days from March through August, while enjoying the milder exposure levels during the colder months.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Saint Petersburg UVI | 1 | 2 | 3 | 4 | 5 | 7 | 7 | 5 | 4 | 2 | 1 | 1 |
| Nizhniy Novgorod UVI | 1 | 2 | 4 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 |
| Yekaterinburg UVI | 1 | 2 | 4 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 1 | 1 |
| Moscow UVI | 1 | 2 | 4 | 5 | 6 | 7 | 7 | 6 | 5 | 3 | 2 | 1 |
| Novosibirsk UVI | 1 | 2 | 4 | 5 | 7 | 7 | 6 | 6 | 5 | 3 | 1 | 1 |
| Bol'shaya Ryazan' | 1 | 2 | 5 | 5 | 7 | 8 | 7 | 7 | 5 | 3 | 2 | 1 |