UV Index in Jefferson, United States

Last updated: June 2, 2025

Understanding the UV Index in Jefferson, United States is crucial for maintaining healthy skin and preventing sunburn, especially during the warmer months when UV levels can peak. With a climate characterized by mild summers and possibly elevated exposure risks, being informed about UV levels can help residents safeguard their skin from harmful rays. The UV Index in Jefferson can reach significant values—peaking at 10 around noon—emphasizing the importance of sun protection strategies. By staying aware of daily UV levels, you can enjoy the outdoors while minimizing the risk of skin damage.

Hourly UV Index in Jefferson

As the sun rises, the UV Index gradually climbs, beginning at a mild 1 at 7:00 AM. By 9:00 AM, it reaches 3, prompting early risers to consider sun protection. The intensity peaks at 1:00 PM with a maximum of 10, signaling the most hazardous conditions for unprotected skin. As the afternoon unfolds, the index dips from 9 at 2:00 PM to 6 by 4:00 PM, offering a brief respite. As the day winds down, the UV rays decrease, falling to 2 by 6:00 PM and returning to a safe 1 by 7:00 PM. Stay mindful of these fluctuations to enjoy the sun while safeguarding your skin!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	9	very high	15 min
13:00	10	very high	15 min
14:00	9	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 Jefferson

The UV Index shows significant seasonal variation, with high-risk months peaking from May to August, where the index reaches levels of 9 to 10 and is categorized as very high. In these months, the recommended burn time is as short as 15 minutes, highlighting the need for increased sun protection strategies. As temperatures rise, particularly from March to September, UV exposure intensifies, with reminders to seek shade, wear protective clothing, and apply sunscreen frequently. Conversely, the months of January and December present a low risk, with an index of 2 and a burn time of 45 minutes. Visitors and residents should be particularly cautious during the high UV months, ensuring to stay safe while enjoying the outdoors.

Monthly Maximum UV Index for Jefferson, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Jefferson. 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 Jefferson, 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 Jefferson UV Index with Other United States Cities

The table above highlights how UV exposure in Jefferson 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.

Jefferson'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
Jefferson	2	3	6	7	9	10	10	9	7	5	3	2
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
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