UV Index in Mount Vernon, United States

Last updated: May 3, 2025

Becoming aware of the UV Index is crucial for residents of Mount Vernon, United States, where the Cfa climate brings warm summers and extended sun exposure. Understanding UV levels helps protect against sunburn and promotes long-term skin health, making it essential to monitor these daily fluctuations. With peaks reaching an intense 11 around noon, knowing when to seek shade or apply sunscreen can significantly reduce the risks associated with UV radiation. Protect your skin and enjoy the sunny outdoors safely by staying informed about the UV Index in your area!

Hourly UV Index in Mount Vernon

Throughout the day, the UV Index experiences a dramatic increase, peaking at 11 between noon and 1 PM, indicating a very high level of solar radiation. Early risers will notice a gentle start, with a UV Index of just 1 at 7 AM, gradually climbing to 4 by 9 AM. As the sun reaches its zenith, values soar to 9 at 11 AM, signaling it's time to take precautions. After the peak, the UV Index begins to decline, dropping to 10 at 2 PM, then tapering off to 3 by 5 PM and resting back down to 1 by 6 PM. Staying protected in the midday sun is crucial for skin safety during these hours!

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
09:004moderate30 min
10:007high25 min
11:009very high15 min
12:0011extreme10 min
13:0011extreme10 min
14:0010very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Mount Vernon

The UV Index experiences notable seasonal changes, with high-risk months primarily occurring from February through August. During this period, the UV Index reaches its peak, consistently showing an extreme category of 11 for the summer months. In April, the UV Index escalates to 11, with a minimal burn time of just 10 minutes. Visitors and residents are advised to take precautionary measures, particularly from February to August, by wearing protective clothing, applying sunscreen, and seeking shade during peak hours to minimize skin damage. As the season transitions into September and October, the UV Index declines to 10 and 8, respectively, indicating a slightly lower risk, yet protective measures remain important. In the cooler months of November and December, the UV Index decreases further to 6 and 4, where the risk is manageable but still requires some attention to prevent overexposure.

Monthly Maximum UV Index for Mount Vernon, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Mount Vernon. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111110864
Data source: Statistical UV Index data for Mount Vernon, 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 Mount Vernon UV Index with Other United States Cities

The table above highlights how UV exposure in Mount Vernon 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.
Mount Vernon'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
Mount Vernon589111111111110864
Houston UVI589111112121110975