Average annual temperature is 26.8 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: 9.7 °C
Number of sunny days: 141 days
Number of rainy days: 224 days
Look at detailed online map of Rio Branco
* Weather data for Rio Branco Brazil is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 32.4 | 32.1 | 32.4 | 32.6 | 32.7 | 31.8 | 34.3 | 37.6 | 37.8 | 38.0 | 38.1 | 36.1 |
| Average daytime temperature (°C) | 30.2 | 30.1 | 30.0 | 29.5 | 29.5 | 28.0 | 31.3 | 34.1 | 34.9 | 35.6 | 35.2 | 33.2 |
| Average temperature (°C) | 25.8 | 25.8 | 25.6 | 25.3 | 25.1 | 23.0 | 25.2 | 28.4 | 29.1 | 30.0 | 29.7 | 28.3 |
| Average night temperature (°C) | 22.6 | 22.9 | 22.5 | 22.2 | 21.5 | 18.5 | 19.9 | 23.5 | 24.6 | 25.6 | 25.4 | 24.8 |
| Absolute minimum temperature (°C) | 19.4 | 20.7 | 21.3 | 17.5 | 18.8 | 9.7 | 14.0 | 17.3 | 18.0 | 22.7 | 21.8 | 23.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 13.0 |
| Daylight mean duration (h) | 12.9 | 12.6 | 12.2 | 11.8 | 11.4 | 11.2 | 11.3 | 11.6 | 12.0 | 12.4 | 12.8 | 13.0 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 9.3 | 8.9 | 8.9 | 9.1 | 8.8 | 9.4 | 10.2 | 10.0 | 9.8 | 10.7 | 11.0 | 10.4 |
| Precipitation (mm) | 378 | 243 | 353 | 170 | 59 | 10 | 0 | 3 | 55 | 53 | 53 | 171 |
| Sunny days | 2 | 0 | 2 | 2 | 14 | 24 | 30 | 24 | 16 | 10 | 10 | 7 |
| Rainy days | 29 | 28 | 29 | 28 | 17 | 6 | 1 | 7 | 14 | 21 | 20 | 24 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rio Branco is at