Average annual temperature is 26.2 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: 13.3 °C
Number of sunny days: 90 days
Number of rainy days: 275 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) | 31.8 | 32.7 | 32.9 | 31.6 | 33.0 | 33.6 | 35.6 | 37.4 | 38.1 | 38.2 | 36.6 | 35.4 |
| Average daytime temperature (°C) | 29.3 | 29.5 | 29.0 | 29.4 | 30.1 | 30.5 | 33.6 | 34.2 | 35.0 | 36.1 | 33.7 | 32.6 |
| Average temperature (°C) | 24.7 | 24.9 | 24.7 | 24.8 | 25.4 | 24.4 | 26.2 | 27.3 | 28.1 | 29.0 | 27.4 | 26.9 |
| Average night temperature (°C) | 21.8 | 22.1 | 22.2 | 22.4 | 22.2 | 19.9 | 20.0 | 22.3 | 23.4 | 24.1 | 23.6 | 23.2 |
| Absolute minimum temperature (°C) | 20.9 | 20.2 | 20.9 | 21.4 | 20.7 | 13.3 | 17.2 | 19.7 | 21.5 | 22.7 | 22.3 | 21.5 |
| 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 | 11.5 | 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) | 8.3 | 8.0 | 6.7 | 8.2 | 9.3 | 10.0 | 10.8 | 9.9 | 10.0 | 10.6 | 9.8 | 10.1 |
| Precipitation (mm) | 271 | 328 | 408 | 208 | 128 | 72 | 1 | 61 | 47 | 46 | 114 | 169 |
| Sunny days | 0 | 0 | 0 | 0 | 6 | 13 | 29 | 15 | 10 | 12 | 4 | 1 |
| Rainy days | 31 | 28 | 31 | 30 | 25 | 17 | 2 | 16 | 20 | 19 | 26 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rio Branco is at