UV Index in Saint Augustine, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Saint Augustine, where the sun shines bright in a humid subtropical climate. Being aware of UV levels not only helps in preventing sunburn but also plays a vital role in maintaining long-term skin health. With peak UV Index readings reaching a high of 11 during midday, it's essential to protect yourself during those hours when sun exposure can pose significant risks. Embrace the stunning Florida sunshine while staying informed about the UV Index to enjoy a safe and healthy outdoor experience in this beautiful coastal city.

Hourly UV Index in Saint Augustine

The UV Index for the day showcases a dramatic increase in intensity as the sun climbs higher in the sky. Starting at a mild 1 at 07:00, it remains low throughout the morning, only reaching 3 by 09:00. However, by 11:00, the index skyrockets to 8, peaking at an intense 11 from 13:00 to 14:00. As the afternoon wanes, the UV levels gradually decrease, dropping to 4 by 17:00 and tapering off to 1 once again by 19:00. It's clear that midday hours pose the greatest risk for sun exposure, making it crucial to take precautions during the peak hours from 11:00 to 14:00.

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
09:003moderate30 min
10:005moderate30 min
11:008very high15 min
12:0010very high15 min
13:0011extreme10 min
14:0011extreme10 min
15:0010very high15 min
16:007high25 min
17:004moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Saint Augustine

Throughout the year, the UV Index exhibits significant seasonal variation, with the highest levels occurring from April to September, when it consistently reaches an extreme category of 11. February and March also present very high UV conditions, making these months critical for sun safety. High-risk months for UV exposure are therefore primarily during the warmer months from April to September, where the burn time drops to as little as 10 minutes. Residents and visitors should take precautions during this period, such as wearing sunscreen, protective clothing, and seeking shade, particularly during peak hours. On the other hand, January and December have a moderate UV Index around 5, allowing for safer outdoor activity but still requiring some sun protection. Always remain vigilant regarding UV exposure to ensure healthy skin while enjoying outside activities.

Monthly Maximum UV Index for Saint Augustine, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Saint Augustine. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111111975
Data source: Statistical UV Index data for Saint Augustine, 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 Saint Augustine UV Index with Other United States Cities

The table above highlights how UV exposure in Saint Augustine 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.
Saint Augustine'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
Saint Augustine589111111111111975
Houston UVI589111112121110975