UV Index in Stamford, United States

Last updated: July 2, 2025

In Stamford, United States, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels is vital, especially during peak hours, as high UV exposure can lead to sunburn and long-term skin damage. With Stamford's Cfa climate, residents experience warm summers that can significantly raise UV levels. For instance, midday readings can reach as high as 12, indicating a need for protective measures to prevent skin-related issues. Stay informed and take the necessary precautions to enjoy the sun safely!

Hourly UV Index in Stamford

The UV Index throughout the day tells an intriguing story of rising intensity and afternoon peaks. Starting from a gentle 1 at 07:00, it gradually ascends, reaching 5 by 10:00. The sun's power is unmistakable as it climbs to an impressive 10 at noon and skyrockets to a blistering 12 by 14:00—the highest point of the day. As the afternoon wanes, the index begins to dip, returning to 5 at 17:00 and then gently fading to 1 by 19:00, signaling the end of the day. This data highlights the importance of sun protection during the peak hours, particularly between 11:00 and 15:00, when UV exposure can be most harmful. Stay safe and enjoy the sunshine wisely!

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
10:005moderate30 min
11:007high25 min
12:0010very high15 min
13:0011extreme10 min
14:0012extreme10 min
15:0010very high15 min
16:008very high15 min
17:005moderate30 min
18:003moderate30 min
19:001low45 min

Monthly UV Index Trends in Stamford

As the seasons change, so does the UV Index, highlighting significant variations in sun exposure risk throughout the year. High-risk months, specifically from March to August, exhibit very high to extreme UV readings, posing increased danger of skin burns, with the lowest burn time recorded at just 10 minutes during these peak months. Visitors and residents are advised to take precautions during these times by wearing protective clothing, using broad-spectrum sunscreen, and seeking shade, particularly between 10 AM and 4 PM. As we transition into September and October, UV levels remain high but start to moderate, providing a slightly lower risk while still encouraging sun safety measures. With the UV Index declining in the cooler months of November and December, protective practices should remain a consideration, especially during outdoor activities. Stay vigilant and prioritize your skin health year-round!

Monthly Maximum UV Index for Stamford, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Stamford. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec479101211121110864
Data source: Statistical UV Index data for Stamford, 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 Stamford UV Index with Other United States Cities

The table above highlights how UV exposure in Stamford 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.
Stamford'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
Stamford479101112121110864
Houston UVI589111112121110975