UV Index in Cheyenne, United States

Last updated: May 3, 2025

In Cheyenne, United States, staying informed about the UV Index is essential for maintaining skin health and preventing sunburn. As a city nestled in the BSk climate zone, Cheyenne experiences significant fluctuations in UV levels throughout the day, with peaks reaching a high of 10 around noon. Understanding these levels not only helps residents protect themselves from harmful UV radiation but also encourages safer outdoor activities. With this knowledge, you can enjoy the beautiful Wyoming sunshine while minimizing your risk of skin damage. Stay vigilant, and keep the UV Index in mind for a safer, healthier outdoor experience!

Hourly UV Index in Cheyenne

The UV Index for today exhibits a clear rise in intensity as the sun reaches its peak. Starting from a gentle 1 at 07:00, the index climbs steadily, touching 2 by 08:00 before surging to 4 at 09:00. The real intensity kicks in around 10:00, where it peaks at a blazing 10 between 12:00 and 14:00, indicating a critical level of solar radiation. As the afternoon wanes, the index starts to dip, marking 8 at 15:00 before descending to 3 by 17:00. As evening approaches, the UV level recedes to 1 by 19:00, signaling a safer time for outdoor activities as the sun sets. Stay sun-smart!

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	9	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Cheyenne

Throughout the year, the UV Index experiences notable fluctuations, with the highest risk months typically occurring from April to August. During this period, the UV Index reaches levels classified as very high to extreme, particularly peaking at 12 in June and July, which corresponds to a burn time of just 10 minutes. In contrast, the winter months of January, November, and December show a much lower UV Index, remaining in the moderate category at 4, allowing for a burn time of 30 minutes. As such, it is crucial for visitors and residents to be particularly vigilant about sun protection—especially in late spring and summer. Sunscreen, protective clothing, and seeking shade during peak hours are highly recommended to mitigate harmful effects from exposure during high UV Index periods.

Monthly Maximum UV Index for Cheyenne, United States

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

The table above highlights how UV exposure in Cheyenne 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.

Cheyenne'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
Cheyenne	4	6	7	10	10	12	12	11	9	6	4	4
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