UV Index in Jacksonville, United States

Last updated: May 3, 2025

Understanding the UV Index in Jacksonville, United States is crucial for protecting your skin from harmful ultraviolet rays. With its Cfa climate, Jacksonville enjoys abundant sunshine, but this also means elevated UV exposure, particularly during the midday hours when the UV Index peaks at a striking 11. By tracking these UV levels, residents and visitors can take proactive measures to prevent sunburn and promote long-term skin health. Knowing when to seek shade, apply sunscreen, or wear protective clothing can significantly mitigate the risks associated with sun exposure. Stay informed and enjoy the beautiful Florida sunshine safely!

Hourly UV Index in Jacksonville

The UV Index demonstrates a clear peak in intensity throughout the day, showcasing the need for sun protection during certain hours. Starting from a low of 1 at 07:00, the index rises steadily, reaching 4 by 09:00, before surging to a powerful 11 at midday. This intense level of UV radiation persists until 13:00, emphasizing the risk during these prime hours. As the afternoon progresses, the index gracefully declines, registering 9 at 14:00 and tapering off to a more moderate 3 by 17:00. By evening, it drops back to 1, signaling a safe window for outdoor activities as the sun sets. Be mindful of these fluctuations and stay protected during peak 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
14:009very high15 min
15:007high25 min
16:005moderate30 min
17:003moderate30 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Jacksonville

As the year progresses, UV exposure levels exhibit significant seasonal changes, with the highest risk occurring from March to October. During these months, the UV Index peaks at 11, classified as extreme, particularly from May to July, where the risk of skin damage is at its greatest, with a burn time of just 10 minutes. Visitors and residents should remain vigilant, particularly from February to October, when the UV Index frequently hits high to very high levels. It is advisable to wear protective clothing, apply sunscreen regularly, and seek shade, especially during peak daytime hours. Meanwhile, the lowest risk months are January and December, where the UV Index drops back to a moderate level, allowing for a more comfortable outdoor experience. Staying informed and proactive about UV exposure is essential for skin protection year-round.

Monthly Maximum UV Index for Jacksonville, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Jacksonville. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111010864
Data source: Statistical UV Index data for Jacksonville, 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 Jacksonville UV Index with Other United States Cities

The table above highlights how UV exposure in Jacksonville 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.
Jacksonville'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
Jacksonville478101111111010864
Houston UVI589111112121110975