Average annual temperature is 27.5 °C
Absolute maximum temperature: 39.0 °C
Absolute minimum temperature: 19.9 °C
Number of sunny days: 190 days
Number of rainy days: 175 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) | 31.2 | 32.0 | 32.1 | 31.2 | 31.9 | 32.8 | 35.2 | 37.1 | 39.0 | 38.9 | 36.0 | 35.0 |
| Average daytime temperature (°C) | 29.4 | 29.7 | 29.6 | 29.9 | 30.3 | 31.1 | 33.0 | 34.8 | 36.6 | 37.8 | 33.8 | 32.5 |
| Average temperature (°C) | 25.2 | 25.5 | 25.2 | 25.5 | 26.1 | 26.3 | 27.7 | 29.2 | 30.7 | 31.9 | 28.9 | 28.2 |
| Average night temperature (°C) | 21.5 | 21.9 | 22.0 | 22.0 | 22.6 | 22.4 | 23.0 | 23.8 | 25.0 | 26.3 | 24.4 | 24.3 |
| Absolute minimum temperature (°C) | 19.9 | 20.2 | 20.4 | 20.5 | 21.2 | 20.8 | 21.5 | 22.6 | 23.4 | 24.0 | 22.7 | 22.7 |
| 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) | 12.5 | 12.3 | 12.1 | 12.0 | 11.8 | 11.7 | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 |
| 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) | 10.3 | 10.1 | 9.0 | 10.0 | 10.1 | 10.5 | 10.9 | 11.2 | 11.3 | 11.2 | 10.7 | 9.9 |
| Precipitation (mm) | 144 | 110 | 230 | 75 | 47 | 2 | 0 | 1 | 0 | 1 | 49 | 63 |
| Sunny days | 2 | 3 | 0 | 6 | 16 | 28 | 30 | 26 | 28 | 27 | 14 | 10 |
| Rainy days | 29 | 25 | 31 | 24 | 15 | 2 | 1 | 5 | 2 | 4 | 16 | 21 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rio Branco is at