UV Index in Altamira, Brazil

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors of Altamira, Brazil, as it plays a vital role in protecting our skin health and preventing sunburn. With a tropical climate that often brings high UV exposure, awareness of daily UV levels can significantly reduce the risks associated with prolonged sun exposure. During peak hours, particularly between 10 AM and 2 PM, the UV Index can soar above 11, indicating extreme conditions where unprotected skin can burn within minutes. Being informed about these levels helps you enjoy Altamira's sunny days while keeping your skin safe.

Hourly UV Index in Altamira

The hourly UV Index paints a vivid picture of the sun's intensity throughout the day. Morning hours start with a gentle rise, peaking at 8 by 10:00 AM. As the clock strikes 11:00 AM, the index climbs to a robust 11, reaching its zenith of 13 at noon and continuing at that level until 1:00 PM. Early afternoon maintains a strong presence with readings of 10 at 2:00 PM, before a gradual decline begins. By 3:00 PM, it dips to 7, and as the day winds down, the UV Index decreases significantly to 3 at 4:00 PM, then falls sharply back to 1 by 5:00 PM, where it remains until the day closes with a 0 by 7:00 PM. If you’re planning outdoor activities, the most intense sun exposure is clearly between 11:00 AM and 1:00 PM, making those hours the ones to seek shade or apply sunscreen for protection.

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	8	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Altamira

The UV Index exhibits extremely high levels throughout the year, with notable peaks between January and April, where it consistently reaches 15-16. These months, particularly March and April, are high-risk periods for sun exposure, as the burn time is as little as 10 minutes. As we move into May, the UV Index slightly decreases to 13, and remains around this level through December, but caution is still essential as exposure risks persist. Residents and visitors should take proactive measures during these months, such as wearing protective clothing, applying sunscreen regularly, and seeking shade to minimize UV exposure and prevent skin damage.

Monthly Maximum UV Index for Altamira, Brazil

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

The table above highlights how UV exposure in Altamira 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.

Altamira'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
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
Altamira	15	15	16	16	13	11	11	12	12	12	14	13