September Weather in Rio Branco

Last updated: March 2, 2024

The weather in Rio Branco, Brazil, during September is characterized by an average temperature of 27°C (82°F). Highs can soar to 37°C (99°F), while lows may dip to 19°C (67°F). Typically, the humidity level in Rio Branco throughout September hovers around 33%.

19°C (67°F)

Minimum temperature

27°C (82°F)

Average temperature

37°C (99°F)

Maximum temperature

33%

Humidity

Precipitation and Sunshine hours

In September, Rio Branco averages 53 mm (2.1 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 12 hours 2 minutes of daylight, with the sun shining for approximately 9 hours 46 minutes each day. Additionally, there is a 52% probability of sunny days during this period.

53 mm (2.1 inches)

Precipitation

10 rainy days

Rainy days

9 hours 46 minutes

Sunshine hours

52%

Chance of sun

UV Index

In September, the UV Index in Rio Branco reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 10 minutes.

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.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 2 4 7 10 12 12 9 6 3 1 1 0 0
Exposure Low Moderate High VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Rio Branco's Climate with Cities Worldwide