UV Index in Earth, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Earth, United States, where the BSk climate can bring varying levels of ultraviolet exposure. Awareness of UV levels not only helps in preventing sunburn but also plays a significant role in long-term skin health. With peak UV Index values reaching as high as 12 around midday, the risk of skin damage escalates, making it essential to adapt your outdoor activities accordingly. By monitoring these levels, you can protect yourself and enjoy the outdoors safely, ensuring your time in the sun is both enjoyable and healthy.

Hourly UV Index in Earth

As the day unfolds, the UV Index begins its climb, starting at a mild 1 in the early morning hours (07:00 and 08:00). By 09:00, it nudges upward to 2, but it's not until 10:00 that it takes a notable leap to 4. The real intensity hits by midday, peaking at a striking 12 at 14:00, with the highest value recorded at 13:00 at 11. As we transition into the late afternoon, the index starts to decline: 11 at 15:00, followed by 9 at 16:00. The evening brings a welcomed drop, reflected in 3 at 18:00 and 2 at 19:00. Remember, during the peak hours (11:00 to 14:00), it’s crucial to protect your skin with sunscreen and seek shade to beat the heat!

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	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	7	high	25 min
12:00	10	very high	15 min
13:00	11	extreme	10 min
14:00	12	extreme	10 min
15:00	11	extreme	10 min
16:00	9	very high	15 min
17:00	6	high	25 min
18:00	3	moderate	30 min
19:00	2	low	45 min

Monthly UV Index Trends in Earth

Throughout the year, UV radiation levels vary significantly, with the highest risk months being March through August. During this period, the UV Index reaches extreme levels, peaking at 12 in June and July, where the recommended burn time is as little as 10 minutes. Visitors and residents should exercise caution and take protective measures, such as wearing sunscreen, hats, and UV-protective clothing, especially in late spring and summer. Conversely, the winter months of January and December present a lower risk with a moderate UV Index of 4 and a longer burn time of 30 minutes. However, it's imperative to remain vigilant year-round, as even moderate levels can contribute to skin damage over time.

Monthly Maximum UV Index for Earth, United States

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

The table above highlights how UV exposure in Earth 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.

Earth'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
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Earth	4	7	9	11	11	12	12	11	10	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5