UV Index in Hartley, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Hartley, United States, where the climate falls within the BSk zone, characterized by distinct seasonal changes and varying UV exposure risks. Awareness of UV levels is vital for preventing sunburn and promoting long-term skin health. During peak hours, the UV Index can soar to dangerous levels—reaching a high of 12 around midday—making it essential for residents to monitor these levels to safeguard their skin and overall well-being. Staying informed will not only help you enjoy the sunshine safely but also contribute to a healthier lifestyle in our vibrant community.

Hourly UV Index in Hartley

As the day unfolds, the UV Index begins its climb, starting at a mild 1 in the early morning hours (07:00 and 08:00). By 09:00, it nudges upward to 2, but it's not until 10:00 that it takes a notable leap to 4. The real intensity hits by midday, peaking at a striking 12 at 14:00, with the highest value recorded at 13:00 at 11. As we transition into the late afternoon, the index starts to decline: 11 at 15:00, followed by 9 at 16:00. The evening brings a welcomed drop, reflected in 3 at 18:00 and 2 at 19:00. Remember, during the peak hours (11:00 to 14:00), it’s crucial to protect your skin with sunscreen and seek shade to beat the heat!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:001low45 min
09:002low45 min
10:004moderate30 min
11:007high25 min
12:0010very high15 min
13:0011extreme10 min
14:0012extreme10 min
15:0011extreme10 min
16:009very high15 min
17:006high25 min
18:003moderate30 min
19:002low45 min

Monthly UV Index Trends in Hartley

Throughout the year, the UV Index experiences notable changes, peaking during the summer months. From March to August, UV levels rise significantly, with April to July marking the highest-risk months, exhibiting extreme levels of UV exposure (Index 11-12) and requiring only 10 minutes of unprotected sun exposure before risking skin burn. As a result, it's crucial for visitors and residents to take protective measures during these months, such as wearing sunscreen, protective clothing, and seeking shade during peak sunlight hours. Conversely, the winter months (January, November, December) present moderate UV levels (Index 4-5) and have longer burn times of 30 minutes, still warranting some level of sun protection but with less urgency. Overall, increased awareness and protective practices are essential, especially from March to August, to mitigate the risk of harmful UV exposure.

Monthly Maximum UV Index for Hartley, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Hartley. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec468111112121110754
Data source: Statistical UV Index data for Hartley, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Hartley UV Index with Other United States Cities

The table above highlights how UV exposure in Hartley compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Hartley's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Hartley468111112121110754
Houston UVI589111112121110975