Climate averages 1991–2020
Porto Velho 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 Porto Velho: daytime highs average 31.7°C and nights cool to about 23.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 178 mm of rain on roughly 23 days, which makes October a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average October day.
The nearest other city in this atlas is Ariquemes (159 km away). In October its highs average 32.1°C, about as warm as Porto Velho, with 142 mm of rain.
Among the 448 cities listed in Brazil, Porto Velho ranks joint 79th of 448 for the warmest October highs and 416th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Porto Velho is 3.5°C warmer than that mean.
From October to November, average highs fall by 1.4°C to 30.3°C, and monthly rainfall rises from 178 mm to 245 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
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 | 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, selected | 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
October in nearby cities
- Ariquemes in OctoberBrazil · 159 kmHigh 32.1°C · Low 23.3°C · 142 mm rain
- Ji Paraná in OctoberBrazil · 319 kmHigh 32.1°C · Low 23.3°C · 143 mm rain
- Riberalta in OctoberBolivia · 343 kmHigh 31.4°C · Low 23.6°C · 159 mm rain
- Cacoal in OctoberBrazil · 401 kmHigh 32.0°C · Low 23.2°C · 156 mm rain
- Rio Branco in OctoberBrazil · 449 kmHigh 31.5°C · Low 23.0°C · 137 mm rain
- Coari in OctoberBrazil · 527 kmHigh 30.3°C · Low 24.7°C · 163 mm rain
- Vilhena in OctoberBrazil · 603 kmHigh 29.5°C · Low 21.2°C · 165 mm rain
- Tefé in OctoberBrazil · 606 kmHigh 30.3°C · Low 24.0°C · 180 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.