UV Index in Jacksonville, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Jacksonville, United States, where the warm, sun-soaked climate can lead to significant UV exposure risks. By staying informed about daily UV levels, you can take essential precautions against sunburn and long-term skin damage. With peak UV indices reaching as high as 11 during the midday hours, awareness becomes vital for maintaining healthy skin and overall well-being. Whether you're enjoying a beach day or simply spending time outdoors, understanding Jacksonville's UV Index will help you make informed decisions to protect yourself from harmful rays.

Hourly UV Index in Jacksonville

The UV Index throughout the day follows a predictable rise and fall, peaking at 11 around 1:00 PM. Starting at a modest 1 at 7:00 AM, it gradually escalates, reaching 10 by 12:00 PM, signaling the need for sun protection. As the afternoon progresses, the index dips from 11 to 8 by 3:00 PM, then declines further to 2 by 6:00 PM, and finally settles back at 1 by 7:00 PM. This data underscores the importance of taking precautions during the hours of peak UV exposure, particularly between 11:00 AM and 3:00 PM, when levels are highest and pose the greatest risk to skin health.

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.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	2	low	45 min
09:00	4	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Jacksonville

As the seasons change, so does the UV Index, significantly impacting skin health for residents and visitors. From March to August, UV levels peak, with high-risk months occurring in April, May, June, and July, marked by an extreme UV Index of 10 or higher and a burn time as short as 10 to 15 minutes. During these months, it is crucial for individuals to take protective measures, such as wearing sunscreen, hats, and protective clothing when outdoors. By September, while the UV Index remains high, there is a slight decline, followed by a gradual return to moderate levels from November to February. It is advisable to stay informed and adjust your sun exposure accordingly, prioritizing skin safety throughout the year.

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.

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.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Jacksonville	3	5	7	9	10	11	11	9	9	6	4	3
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5