Climate averages 1991–2020
Rio Branco weather
in July.
A hot, fairly dry month: the 4th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Rio Branco: daytime highs average 30.4°C and nights cool to about 20.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 21 mm of rain on roughly 4 days, which makes July a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 36 min on an average July day.
The nearest other city in this atlas is Riberalta (224 km away). In July its highs average 30.0°C, about as warm as Rio Branco, with 24 mm of rain.
Among the 448 cities listed in Brazil, Rio Branco ranks 47th of 448 for the warmest July highs and joint 149th of 448 for the driest July (rainfall, lowest first). The mean July high of those 448 cities is 24.7°C; Rio Branco is 5.7°C warmer than that mean.
From July to August, average highs rise by 1.7°C to 32.1°C, and monthly rainfall rises from 21 mm to 38 mm.
The annual picture
July 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, selected | 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 | 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
July in nearby cities
- Riberalta in JulyBolivia · 224 kmHigh 30.0°C · Low 20.7°C · 24 mm rain
- Puerto Maldonado in JulyPeru · 328 kmHigh 27.9°C · Low 19.7°C · 46 mm rain
- Porto Velho in JulyBrazil · 449 kmHigh 31.3°C · Low 21.9°C · 22 mm rain
- Ariquemes in JulyBrazil · 522 kmHigh 32.7°C · Low 21.5°C · 13 mm rain
- Cruzeiro do Sul in JulyBrazil · 595 kmHigh 28.5°C · Low 21.0°C · 56 mm rain
- Cusco in JulyPeru · 601 kmHigh 15.0°C · Low 4.9°C · 11 mm rain
- Trinidad in JulyBolivia · 626 kmHigh 27.9°C · Low 19.3°C · 41 mm rain
- Ji Paraná in JulyBrazil · 649 kmHigh 32.2°C · Low 20.8°C · 11 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.