UV Index in Valley, United States

Last updated: May 3, 2025

In Valley, United States, understanding the UV Index is essential for maintaining skin health and preventing sunburn. As a city with a Cfa climate, residents often experience high UV levels, particularly between late morning and early afternoon when the index peaks at 11. This awareness is vital, not just to avoid painful sunburns, but also to protect against long-term skin damage. With the sun's rays being particularly intense during summer months, staying informed about daily UV levels can help you enjoy the outdoors safely and responsibly.

Hourly UV Index in Valley

The UV Index throughout the day exhibits a striking rise and fall, mirroring the sun's journey across the sky. Starting at a modest 1 at 7:00 AM, it quickly escalates to a notable 11 by 12:00 PM, making this the peak time for sun exposure. The intensity remains high for another hour before gradually declining, dropping to 7 at 3:00 PM and descending further to 1 by 7:00 PM. This pattern warns us to embrace the sun’s rays with caution, especially between 11:00 AM and 1:00 PM, where the UV levels soar. As the day winds down, the diminishing UV Index suggests a welcoming return to safer conditions. Remember, while the sun can be inviting, protecting your skin during peak hours is essential!

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
08:002low45 min
09:005moderate30 min
10:007high25 min
11:009very high15 min
12:0011extreme10 min
13:0011extreme10 min
14:009very high15 min
15:007high25 min
16:005moderate30 min
17:002low45 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Valley

As the seasons change, so does the UV Index, which significantly impacts exposure levels throughout the year. January starts with a moderate UV Index of 4, allowing for a burn time of 30 minutes. However, February ramps up to a high index of 7, with a reduced burn time of 25 minutes. The peak months, from March through August, experience extreme UV levels, particularly in May and June, where the UV Index reaches 11 and burn times shrink to just 10 minutes. September and October see a slight decrease, yet still maintain a very high index of 9 and 8, respectively. The year concludes with lower levels in November and December. Visitors and residents should take special care during the high-risk months from March to August, ensuring proper sun protection measures, such as wearing sunscreen, hats, and protective clothing, to mitigate the risk of UV-related harm.

Monthly Maximum UV Index for Valley, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Valley. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Statistical UV Index data for Valley, 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 Valley UV Index with Other United States Cities

The table above highlights how UV exposure in Valley 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.
Valley'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
Valley47810111111119864
Houston UVI589111112121110975