Climate averages 1991–2020
Porto Velho 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 Porto Velho: daytime highs average 31.3°C and nights cool to about 21.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 22 mm of rain on roughly 5 days, which makes July a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 40 min on an average July day.
The nearest other city in this atlas is Ariquemes (159 km away). In July its highs average 32.7°C, 1.4°C warmer than Porto Velho, with 13 mm of rain.
Among the 448 cities listed in Brazil, Porto Velho ranks joint 34th of 448 for the warmest July highs and joint 153rd of 448 for the driest July (rainfall, lowest first). The mean July high of those 448 cities is 24.7°C; Porto Velho is 6.6°C warmer than that mean.
From July to August, average highs rise by 1.7°C to 33.0°C, and monthly rainfall rises from 22 mm to 42 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
Porto Velho climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C23.4°C | 23.4°C | 303 | 28.6 | 12.613 h |
| February | 29.4°C23.3°C | 23.3°C | 318 | 27.0 | 12.412 h |
| March | 29.3°C23.4°C | 23.4°C | 328 | 29.4 | 12.212 h |
| April | 29.2°C23.3°C | 23.3°C | 228 | 26.4 | 11.912 h |
| May | 29.1°C22.9°C | 22.9°C | 133 | 21.4 | 11.712 h |
| June | 29.7°C22.3°C | 22.3°C | 43 | 9.5 | 11.612 h |
| July, selected | 31.3°C21.9°C | 21.9°C | 22 | 4.7 | 11.712 h |
| August | 33.0°C22.9°C | 22.9°C | 42 | 7.5 | 11.812 h |
| September | 32.6°C23.8°C | 23.8°C | 103 | 16.7 | 12.012 h |
| October | 31.7°C23.9°C | 23.9°C | 178 | 23.2 | 12.312 h |
| November | 30.3°C23.7°C | 23.7°C | 245 | 26.2 | 12.513 h |
| December | 29.7°C23.5°C | 23.5°C | 298 | 28.7 | 12.613 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
- Ariquemes in JulyBrazil · 159 kmHigh 32.7°C · Low 21.5°C · 13 mm rain
- Ji Paraná in JulyBrazil · 319 kmHigh 32.2°C · Low 20.8°C · 11 mm rain
- Riberalta in JulyBolivia · 343 kmHigh 30.0°C · Low 20.7°C · 24 mm rain
- Cacoal in JulyBrazil · 401 kmHigh 32.2°C · Low 20.3°C · 11 mm rain
- Rio Branco in JulyBrazil · 449 kmHigh 30.4°C · Low 20.4°C · 21 mm rain
- Coari in JulyBrazil · 527 kmHigh 28.9°C · Low 23.7°C · 101 mm rain
- Vilhena in JulyBrazil · 603 kmHigh 29.3°C · Low 18.2°C · 10 mm rain
- Tefé in JulyBrazil · 606 kmHigh 28.6°C · Low 22.8°C · 132 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 Porto Velho) is explained once on the Porto Velho year overview and on the Sources, method and limits page.