Last updated: August 1, 2025
Understanding the UV Index is crucial for residents of Knob Noster, United States, where sun exposure can vary significantly throughout the day. With peak UV levels reaching 11 around midday, being aware of these readings can help prevent painful sunburn and protect your skin health over time. Knob Noster's humid continental climate (Cfa) means you can enjoy plenty of sunny days, but it also poses heightened risks for ultraviolet exposure, especially during the summer months. Staying informed about the UV Index not only enhances your outdoor activities but also safeguards your long-term health—so make sure to check the UV levels before heading out!
The UV Index today showcases a dramatic rise in sun intensity as the morning gives way to the blazing afternoon. Starting at a mild 1 at 7:00 AM, it gradually escalates to a moderate 3 by 9:00 AM. By 10:00 AM, the index spikes to 5, signaling a need for caution. As the clock approaches noon, the index reaches a peak of 10, representing a high risk for harm from unprotected sun exposure. The zenith of 11 at 1:00 PM demands serious precautions. However, by 4:00 PM, it begins to decline, settling at 6 by the late afternoon and tapering off to 1 by dusk. It's essential to stay protected during those peak hours to enjoy the sun safely!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 1 | low | 45 min |
| 09:00 | 3 | moderate | 30 min |
| 10:00 | 5 | moderate | 30 min |
| 11:00 | 7 | high | 25 min |
| 12:00 | 9 | very high | 15 min |
| 13:00 | 10 | very high | 15 min |
| 14:00 | 9 | very high | 15 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 6 | high | 25 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 2 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, seasonal variations in UV Index highlight the importance of sun safety. The high-risk months for UV exposure occur from April to August, where the index reaches extreme levels of 11 in June and July, with a burn time as short as 10 minutes. As visitors and residents engage in outdoor activities during these peak months, it's crucial to implement protective measures such as wearing sunscreen, protective clothing, and seeking shade during the hottest parts of the day. In contrast, the UV Index during the winter months (January, February, and December) remains in the moderate range, with burn times of 30 minutes. Nonetheless, it’s still advisable to take precautions, especially during midday hours, to safeguard against UV damage year-round.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chicago UVI | 3 | 4 | 6 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 4 | 2 |
| Brooklyn UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| New York City UVI | 3 | 5 | 6 | 8 | 10 | 10 | 9 | 9 | 8 | 6 | 4 | 2 |
| Knob Noster | 3 | 5 | 6 | 10 | 10 | 11 | 11 | 10 | 9 | 6 | 4 | 3 |
| Los Angeles UVI | 4 | 6 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 7 | 5 | 4 |
| Houston UVI | 5 | 8 | 9 | 11 | 11 | 12 | 12 | 11 | 10 | 9 | 7 | 5 |