Rio Branco Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Rio Branco.
Climate overview of Rio Branco
Rio Branco, Acre, Brazil, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 32°C (90°F), peaking in September at 35°C (95°F) and dipping in May to 31°C (88°F).
The city has a wet climate, receiving around 1857 mm (73 in) of rainfall per year. Despite the high annual total, it has distinct dry (June to July) and wet (November to April) seasons. February is the wettest month. Sunshine peaks in July, when the city sees around 7.4 hours of sunshine per day.
Rio Branco Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rio Branco - and find the best time to visit.
Monthly Temperature in Rio Branco
With minimal seasonal shifts, Rio Branco experiences a constant climate year-round. On average, daytime temperatures range from a very warm 35°C (95°F) in September to a very warm 31°C (88°F) in May.
Nighttime temperatures range from 23°C (73°F) in September to 20°C (68°F) in May.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Rio Branco
Rio Branco has a notably wet climate with abundant precipitation, recording 1857 mm (73 in) of rainfall per year. The seasons in Rio Branco bring significant changes in precipitation. The wettest month, February, receives heavy rainfall, with an average of 275 mm (11 in) of precipitation. This rainfall is distributed across 25 rainy days.
In contrast, the driest month, July, experiences much less rainfall, totaling 26 mm (1 in) over 7 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Rio Branco Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Rio Branco
In Rio Branco, summer days are longer and more sunny, with daily sunshine hours peaking at 7.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. February sees a soft sun for only 3.0 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Rio Branco by Month
The city experiences its highest humidity in January, reaching 87%. In August, the humidity drops to its lowest level at 77%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Rio Branco
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June and July
- Warmest weather: August, September and October
- Most sunshine: July
- Fewest rainy days: June, July and August
- Seasonal pattern: Distinct dry (June to July) and wet (November to April) seasons
Frequently asked questions about the climate in Rio Branco
What is the best time to visit Rio Branco?
May, June and July typically offer the most optimal weather in Rio Branco. In contrast, January, February, March, August, September, October, November and December tend to have less optimal conditions. Rio Branco has distinct dry (June to July) and wet (November to April) seasons.
What temperatures can I expect in Rio Branco?
Daytime highs range from 31°C (88°F) in May to 35°C (95°F) in September. Nighttime lows range from 20°C (68°F) to 23°C (73°F). Temperatures stay relatively stable year-round.
How much rain does Rio Branco get?
Annual rainfall is around 1857 mm (73 in). February is the wettest month with 275 mm (11 in), while July is the driest with 26 mm (1 in).
How sunny is Rio Branco?
Rio Branco receives around 1,760 hours of sunshine per year. July is the sunniest month with 221 hours, while February is the cloudiest with just 91 hours.
Rio Branco 3-Day Forecast
Rio Branco on the map
Rio Branco is highlighted - select any city to see its climate.
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