nomadseason

May Weather in Rio Branco, Brazil

Last updated: August 22, 2025

In Rio Branco, Brazil, the average temperature in May is a pleasant 25°C (77°F). However, be prepared for some variability, as temperatures can dip to a minimum of 15°C (59°F) and rise to a maximum of 34°C (93°F). You can expect an average precipitation of 83 mm (3.3 in) spread over 14 days, along with a high average humidity of 84%.

May Temperature in Rio Branco

In May in Rio Branco, the average temperature is 25°C (77°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 15°C (59°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the local attractions.

May Weather in Rio Branco: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Rio Branco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Branco, May typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (93°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec787878787776767881807979
Data source: Temperature data for Rio Branco generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Rio Branco

In Rio Branco in May, the precipitation amount is 83 mm (3.3 in) spread over a period of 14 days.

May Precipitation Trends in Rio Branco

The chart displays monthly precipitation patterns in Rio Branco, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Rio Branco, May typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2642852881688333142653125207305
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Rio Branco

In Rio Branco in May, humidity is 84%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities challenging and prompting travelers to seek shade and stay hydrated.

May Average Humidity in Rio Branco

This chart illustrates the average monthly humidity levels in Rio Branco, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Rio Branco is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%89%84%67%46%37%33%44%73%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rio Branco

In Rio Branco in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Rio Branco.

Maximum UV Index Levels in Rio Branco for May

The chart shows the monthly maximum UV Index (UVI) for Rio Branco in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Rio Branco typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151616141210101112141514
Data source: Rio Branco May UVI data generated using 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.

How May Weather in Rio Branco Compares to Other Months

Weather in Rio Branco varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Rio Branco, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rio Branco, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)264 mm (10.4 inches)88%extreme
February Weather25°C (78°F)285 mm (11.2 inches)87%extreme
March Weather26°C (78°F)288 mm (11.3 inches)87%extreme
April Weather26°C (78°F)168 mm (6.6 inches)89%extreme
May Weather25°C (77°F)83 mm (3.3 inches)84%extreme
June Weather24°C (76°F)33 mm (1.3 inches)67%very high
July Weather25°C (76°F)14 mm (0.6 inches)46%very high
August Weather26°C (79°F)26 mm (1.0 inches)37%extreme
September Weather27°C (82°F)53 mm (2.1 inches)33%extreme
October Weather27°C (81°F)125 mm (4.9 inches)44%extreme
November Weather26°C (80°F)206 mm (8.1 inches)73%extreme
December Weather26°C (79°F)305 mm (12.0 inches)88%extreme

Compare Rio Branco's Climate with Cities Worldwide