UV Index in Goias, Brazil

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Goias, Brazil, where the sun shines intensely throughout the year. With a tropical climate characterized by high temperatures and abundant sunshine, it’s essential to be aware of the solar radiation levels to safeguard your skin health and prevent sunburn. As the UV Index peaks at 9 during midday hours—signifying a very high risk of harm from unprotected sun exposure—it’s vital to take precautions, especially during the late morning and early afternoon. Stay informed and protect yourself to enjoy the beautiful rays of Goias safely!

Hourly UV Index in Goias

As the sun rises, the UV Index starts off low, peaking at just 1 by 8 AM. However, as the day progresses, intensity increases, reaching a notable 6 by 10 AM and soaring to its maximum of 9 from noon to 1 PM. This peak signifies a time when sun safety becomes essential, urging you to seek shade and apply sunscreen. The afternoon sees a gradual decline with the index dropping to 5 by 3 PM and lower values as the sun begins its descent. By ~4 PM, the index falls to 2, and soon after, it returns to 1 by 5 PM, fading to 0 in the evening. Overall, it’s wise to take precautions during the midday hours when the UV levels are at their highest!

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	6	high	25 min
11:00	8	very high	15 min
12:00	9	very high	15 min
13:00	9	very high	15 min
14:00	7	high	25 min
15:00	5	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 Goias

The seasonal UV Index shows extreme levels from January to April, with consistently high values around 15-16, resulting in a burn time of just 10 minutes. This trend continues into August and September, where the Index rises again to 11-12. From May to July, the Index drops slightly to the very high category at 9-10, allowing for a longer burn time of 15 minutes. Visitors and residents should be particularly cautious during the winter and early spring months, as well as in late summer and early fall, when UV exposure is heightened. It's crucial to take protective measures such as wearing sunscreen, protective clothing, and seeking shade during peak hours, especially during the high-risk months of January through April and August through October.

Monthly Maximum UV Index for Goias, Brazil

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

The table above highlights how UV exposure in Goias 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.

Goias'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
Goias	15	16	14	12	10	9	9	11	12	14	15	16
Fortaleza UVI	14	14	15	15	13	11	11	12	13	13	13	13