Average annual temperature is 26.2 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: 12.5 °C
Number of sunny days: 99 days
Number of rainy days: 266 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) | 31.5 | 31.2 | 31.8 | 31.2 | 32.0 | 32.4 | 33.9 | 36.6 | 37.0 | 37.6 | 37.3 | 33.1 |
| Average daytime temperature (°C) | 29.8 | 29.0 | 29.3 | 29.3 | 29.3 | 29.1 | 32.1 | 34.0 | 34.8 | 35.3 | 33.5 | 30.8 |
| Average temperature (°C) | 25.0 | 24.9 | 25.0 | 25.0 | 25.1 | 23.8 | 25.8 | 27.8 | 28.4 | 29.2 | 27.9 | 26.3 |
| Average night temperature (°C) | 22.0 | 22.3 | 22.2 | 22.2 | 22.2 | 19.6 | 20.4 | 22.4 | 23.7 | 24.6 | 23.6 | 23.1 |
| Absolute minimum temperature (°C) | 19.8 | 19.7 | 20.8 | 20.7 | 20.0 | 12.5 | 17.0 | 18.9 | 22.2 | 22.2 | 20.7 | 21.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 | 11.6 | 11.8 | 12.0 | 12.3 | 12.6 | 12.7 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 9.0 | 7.8 | 8.0 | 8.6 | 8.9 | 9.7 | 10.8 | 10.3 | 10.4 | 10.5 | 9.7 | 9.3 |
| Precipitation (mm) | 232 | 273 | 328 | 203 | 145 | 44 | 3 | 18 | 46 | 50 | 124 | 158 |
| Sunny days | 0 | 2 | 0 | 2 | 1 | 15 | 25 | 22 | 12 | 12 | 7 | 1 |
| Rainy days | 31 | 26 | 31 | 28 | 30 | 15 | 6 | 9 | 18 | 19 | 23 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rio Branco is at