UV Index in Mafra, Brazil

Last updated: May 3, 2025

Being aware of the UV Index is crucial for residents of Mafra, Brazil, where the climate can significantly influence daily sun exposure. Understanding UV levels is essential not only for preventing sunburn but also for maintaining long-term skin health. In Mafra's temperate Cfb climate, UV exposure can spike during midday hours, with indices reaching up to 7 between 12 PM and 1 PM. By monitoring the UV Index, you can make informed decisions that protect your skin and enjoy the sunshine safely.

Hourly UV Index in Mafra

The UV Index exhibits a dynamic pattern throughout the day, peaking sharply around midday. Starting off mild at 07:00 and 08:00 with a UV Index of 1, exposure remains minimal. However, as the sun climbs, the intensity increases significantly by 09:00, reaching 3, and continues to rise to a notable peak of 7 at 12:00 and 13:00. This indicates a need for sun protection during these hours. By 14:00, the UV Index begins to decline, falling to 5, and subsequently drops further, settling at 1 by 17:00 and finally reaching 0 by 18:00. In summary, the day's UV exposure highlights the importance of vigilance against UV radiation, particularly between 10:00 and 14:00 when the sun’s rays are at their strongest.

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	6	high	25 min
12:00	7	high	25 min
13:00	7	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 Mafra

Throughout the year, the UV Index shows significant seasonal variations, with extreme risk levels dominating from January to April and then again in September and November. The highest UV readings peak at 15 during the winter months and early spring, indicating a burn time of just 10 minutes. Following this period, there is a notable decrease in UV Index readings, dropping to a high risk level in June and July at 6, where burn times extend to 25 minutes. As August arrives, the index rises again to 9 in the very high category before reverting to extreme levels in the fall months. Given this data, it is crucial for both visitors and residents to exercise caution, particularly during high-risk months (January-April, September, November) by wearing protective clothing, sunscreen, and limiting sun exposure to mitigate harmful effects.

Monthly Maximum UV Index for Mafra, Brazil

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

The table above highlights how UV exposure in Mafra 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.

Mafra'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
Mafra	15	15	13	11	8	6	6	9	11	13	15	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