UV Index in Colorado, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Colorado, Brazil, where the unique climate can lead to varying levels of sun exposure throughout the day. Being aware of these UV levels is vital not only for preventing painful sunburns but also for safeguarding long-term skin health. With peak UV Index readings soaring to 8 around midday, Coloradans must take precautions, especially in the sun-drenched hours from 10 AM to 3 PM. Whether you're enjoying the great outdoors or simply running errands, knowing the UV Index can help you make informed decisions to protect your skin while enjoying the beautiful Colorado landscape.

Hourly UV Index in Colorado

At dawn, the UV Index remains low, peaking at 1 by 08:00. As the sun rises higher, a notable increase occurs, reaching 3 at 09:00 and escalating dramatically to a maximum of 8 from 12:00 to 13:00. This midday surge indicates a higher risk for sun exposure, making it essential to take precautions such as wearing sunscreen and protective clothing. The intensity then gradually declines, dropping to 4 by 15:00, and continuing its descent to 0 by 19:00, marking the end of the sun’s peak influence for the day. Stay mindful of these hourly fluctuations to enjoy the sun safely!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	6	high	25 min
15:00	4	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