UV Index in Gillette, United States

Last updated: July 2, 2025

Understanding the UV Index is essential for residents of Gillette, United States, as it serves as a crucial indicator of sun exposure that can directly impact skin health and the risk of sunburn. With the city's semi-arid climate (BSk), citizens can experience heightened UV levels, especially during peak midday hours when values can soar to a staggering 11. By staying informed about UV levels, you can take proactive measures to protect your skin and enjoy the outdoors safely, ensuring that your time under the sun is both enjoyable and health-conscious.

Hourly UV Index in Gillette

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 Gillette

During the year, the UV Index shows significant seasonal changes that are crucial for visitors and residents to be aware of. The high-risk months for UV exposure are from April to August, with June and July having the highest UV Index of 11, categorized as extreme, where the burn time is just 10 minutes. In April and May, the UV Index reaches a very high level, necessitating caution. Conversely, the winter months, particularly January, October, and November, pose a lower risk with moderate UV levels and longer burn times of 30 minutes or more. It is essential for individuals to protect their skin by seeking shade, wearing protective clothing, and applying sunscreen, especially during the peak risk months to mitigate the effects of intense UV exposure.

Monthly Maximum UV Index for Gillette, United States

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

The table above highlights how UV exposure in Gillette 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.

Gillette'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
Gillette	3	5	6	10	9	11	11	10	8	5	3	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