UV Index in Colorado, Brazil

Last updated: June 2, 2025

Understanding the UV Index in Colorado is essential for protecting your skin against harmful ultraviolet rays. With UV levels fluctuating throughout the day, especially peaking at 6 around midday, being aware of these UV forecasts can help you prevent sunburn and maintain long-term skin health. Colorado's climate, characterized by its Cfa zone, often leads to increased UV exposure, making it crucial for residents and visitors alike to stay informed. Whether you're hiking, skiing, or enjoying the great outdoors, knowing the UV Index can significantly enhance your sun safety practices.

Hourly UV Index in Colorado

The UV Index for the day shows a noticeable fluctuation as the hours progress. Starting off at a mild level of 1 at 7:00 and 8:00, the index begins to rise, reaching a peak of 6 between 12:00 and 13:00—the perfect time to seek shade if you’re outdoors! As the afternoon rolls on, the index dips gradually, dropping to 3 by 15:00, then further to 1 by 17:00. Finally, the UV levels fall to 0 after 18:00, signaling a comfortable end to the day. Remember, during those peak hours, it’s essential to protect your skin from overexposure!

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	5	moderate	30 min
12:00	6	high	25 min
13:00	6	high	25 min
14:00	5	moderate	30 min
15:00	3	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Colorado

The UV Index fluctuates significantly throughout the year, showcasing extreme levels from January to April and again in September to November. The highest-risk months are primarily January, February, October, November, and December, all exceeding a UV Index of 15, with an extreme exposure category that permits a burn time of just 10 minutes. As the year progresses, UV levels gradually decrease, reaching a high index of 6 to 7 during June and July, before experiencing a slight rise in August. To ensure safety, it is essential for both visitors and residents to apply sunscreen, wear protective clothing, and limit sun exposure during the peak months of March, April, September, October, and December when the risk of skin damage is heightened.

Monthly Maximum UV Index for Colorado, Brazil

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

The table above highlights how UV exposure in Colorado compares to other major locations across Brazil. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Colorado's solar exposure compared to other cities in Brazil. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rio de Janeiro UVI	15	14	13	10	7	6	7	9	11	12	13	15
Sao Paulo UVI	16	15	12	11	8	6	7	9	11	13	14	15
Colorado	15	15	13	11	8	6	7	10	11	14	15	16
Belo Horizonte UVI	17	16	14	12	9	7	8	10	12	13	14	16
Salvador UVI	14	14	14	13	10	9	9	12	12	15	15	14
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13