Climate averages 1991–2020
Rio Branco weather
in October.
A hot, wet month: the 3rd warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Rio Branco: daytime highs average 31.5°C and nights cool to about 23.0°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 137 mm of rain on roughly 20 days, which makes October a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average October day.
The nearest other city in this atlas is Riberalta (224 km away). In October its highs average 31.4°C, about as warm as Rio Branco, with 159 mm of rain.
Among the 448 cities listed in Brazil, Rio Branco ranks joint 85th of 448 for the warmest October highs and joint 336th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Rio Branco is 3.3°C warmer than that mean.
From October to November, average highs fall by 1.4°C to 30.1°C, and monthly rainfall rises from 137 mm to 199 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rio Branco climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C22.9°C | 22.9°C | 255 | 27.6 | 12.613 h |
| February | 29.2°C22.8°C | 22.8°C | 243 | 25.3 | 12.412 h |
| March | 29.2°C22.8°C | 22.8°C | 249 | 27.2 | 12.212 h |
| April | 28.9°C22.4°C | 22.4°C | 160 | 22.7 | 11.912 h |
| May | 28.4°C21.6°C | 21.6°C | 76 | 15.4 | 11.712 h |
| June | 28.9°C20.9°C | 20.9°C | 30 | 6.8 | 11.612 h |
| July | 30.4°C20.4°C | 20.4°C | 21 | 4.2 | 11.612 h |
| August | 32.1°C21.4°C | 21.4°C | 38 | 6.3 | 11.812 h |
| September | 32.4°C22.7°C | 22.7°C | 76 | 11.9 | 12.012 h |
| October, selected | 31.5°C23.0°C | 23.0°C | 137 | 19.5 | 12.312 h |
| November | 30.1°C22.9°C | 22.9°C | 199 | 22.9 | 12.613 h |
| December | 29.5°C23.0°C | 23.0°C | 246 | 26.3 | 12.713 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Riberalta in OctoberBolivia · 224 kmHigh 31.4°C · Low 23.6°C · 159 mm rain
- Puerto Maldonado in OctoberPeru · 328 kmHigh 30.2°C · Low 22.7°C · 223 mm rain
- Porto Velho in OctoberBrazil · 449 kmHigh 31.7°C · Low 23.9°C · 178 mm rain
- Ariquemes in OctoberBrazil · 522 kmHigh 32.1°C · Low 23.3°C · 142 mm rain
- Cruzeiro do Sul in OctoberBrazil · 595 kmHigh 30.3°C · Low 22.7°C · 176 mm rain
- Cusco in OctoberPeru · 601 kmHigh 16.5°C · Low 7.7°C · 84 mm rain
- Trinidad in OctoberBolivia · 626 kmHigh 31.0°C · Low 23.3°C · 161 mm rain
- Ji Paraná in OctoberBrazil · 649 kmHigh 32.1°C · Low 23.3°C · 143 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rio Branco) is explained once on the Rio Branco year overview and on the Sources, method and limits page.