Climate averages 1991–2020
Porto Velho weather
in March.
A hot, very wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a hot month in Porto Velho: daytime highs average 29.3°C and nights cool to about 23.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 328 mm of rain on roughly 29 days, which makes March a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average March day.
The nearest other city in this atlas is Ariquemes (159 km away). In March its highs average 29.4°C, about as warm as Porto Velho, with 274 mm of rain.
Among the 448 cities listed in Brazil, Porto Velho ranks joint 102nd of 448 for the warmest March highs and joint 416th of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Porto Velho is 1.4°C warmer than that mean.
From March to April, average highs stay level at 29.2°C, and monthly rainfall falls from 328 mm to 228 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- Ariquemes in MarchBrazil · 159 kmHigh 29.4°C · Low 22.8°C · 274 mm rain
- Ji Paraná in MarchBrazil · 319 kmHigh 29.2°C · Low 22.8°C · 241 mm rain
- Riberalta in MarchBolivia · 343 kmHigh 29.4°C · Low 23.3°C · 255 mm rain
- Cacoal in MarchBrazil · 401 kmHigh 29.2°C · Low 22.6°C · 270 mm rain
- Rio Branco in MarchBrazil · 449 kmHigh 29.2°C · Low 22.8°C · 249 mm rain
- Coari in MarchBrazil · 527 kmHigh 29.3°C · Low 23.9°C · 334 mm rain
- Vilhena in MarchBrazil · 603 kmHigh 27.5°C · Low 20.9°C · 241 mm rain
- Tefé in MarchBrazil · 606 kmHigh 29.5°C · Low 23.6°C · 329 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.