UV Index in Miami, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors in Miami, where the sun shines brightly and the temperatures soar throughout the year. With UV levels frequently peaking at 12 during midday, knowing the UV index helps you take proactive steps against sunburn and long-term skin damage. In this tropical paradise characterized by a Csa climate, sun exposure risks are high, making it essential to comprehend how UV radiation can impact your skin health. Stay informed, protect yourself, and enjoy all that Miami has to offer while prioritizing your safety in the sun!

Hourly UV Index in Miami

As the sun rises, the UV Index begins its ascent, peaking brilliantly at 12 around noon. Starting at an easy 2 at 7:00 AM, the intensity escalates through the morning, hitting 11 by 11:00 AM. The sun's fierce rays reach their high at 12:00 PM, maintaining the intensity until 1:00 PM, with both hours registering a maximum of 12. As the afternoon progresses, the index begins its decline, dropping to 10 at 2:00 PM, then tapering off further to 8 at 3:00 PM and descending to 5 by 4:00 PM. By the late evening, the numbers show a comforting dip, falling to 1 by 6:00 PM and holding steady until sunset. Stay protected under the sun, especially during those 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
07:002low45 min
08:003moderate30 min
09:006high25 min
10:009very high15 min
11:0011extreme10 min
12:0012extreme10 min
13:0012extreme10 min
14:0010very high15 min
15:008very high15 min
16:005moderate30 min
17:002low45 min
18:001low45 min
19:001low45 min

Monthly UV Index Trends in Miami

Throughout the year, UV exposure varies significantly, with the high-risk months being March through August, when the UV Index peaks at 12, indicating extreme exposure levels. Specifically, April, May, and June consistently show this maximum UV Index, resulting in a burn time of only 10 minutes for unprotected skin. As summer transitions to fall, the UV Index gradually decreases, but still poses a very high risk in September and October with indices of 10 and 8, respectively. Residents and visitors should remain vigilant, particularly from March to August, and take protective measures, such as applying sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours to minimize the risk of skin damage. In contrast, the winter months of January and December see lower UV exposure, categorized as moderate, with longer burn times of 30 minutes, making sun protection less critical but still advisable.

Monthly Maximum UV Index for Miami, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Miami. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec479111212121110864
Data source: Statistical UV Index data for Miami, 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 Miami UV Index with Other United States Cities

The table above highlights how UV exposure in Miami 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.
Miami'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
Miami479111212121110864
Houston UVI589111112121110975