UV Index in Thermopolis, United States

Last updated: June 2, 2025

Understanding the UV Index in Thermopolis, Wyoming is vital for protecting your skin and overall health. High UV levels can lead to painful sunburns and increase the risk of long-term skin damage such as melanoma. In this region, characterized by a semi-arid climate, summer days can expose residents and visitors to intense sunlight, with peak UV index readings reaching 11 around midday. By staying informed about daily UV levels, you can take proactive measures to safeguard your skin, ensuring that your time outdoors remains enjoyable and safe.

Hourly UV Index in Thermopolis

The UV Index throughout the day showcases a steady increase as the sun climbs, peaking at an intense 11 between 12:00 PM and 2:00 PM. Early morning hours start at a mild 1 at 7:00 AM, gradually rising to 4 by 9:00 AM. As the clock strikes 10:00 AM, the index reaches 6, marking the onset of higher UV levels. From 11:00 AM, the sun’s intensity ramps up significantly, hitting 9 and holding steady at 11 during the peak afternoon hours. As shadows lengthen after 2:00 PM, the UV Index dips, descending to 9 at 3:00 PM, and gradually falling to 2 by the evening. Remember to stay protected during peak hours for optimal sun safety!

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	11	extreme	10 min
13:00	11	extreme	10 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	7	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 Thermopolis

Throughout the year, seasonal UV changes reflect a pattern of increasing intensity from winter to summer and a decline toward winter again. High-risk months occur from March to August, peaking in June and July when the UV Index reaches an extreme level of 11, with a burn time of just 10 minutes. During these months, residents and visitors should take extra precautions, such as seeking shade, wearing protective clothing, and applying sunscreen regularly, especially between 10 a.m. and 4 p.m. As the fall approaches, UV levels gradually decrease, but caution should still be exercised in September and early October when UV values remain elevated. Overall, ensuring proper skin protection is crucial during the high-risk periods to mitigate the dangers of UV exposure.

Monthly Maximum UV Index for Thermopolis, United States

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

The table above highlights how UV exposure in Thermopolis 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.

Thermopolis'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
Thermopolis	3	5	6	9	10	11	11	10	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