Climate averages 1991–2020
Rio de Janeiro weather
in March.
A hot, wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a hot month in Rio de Janeiro: daytime highs average 29.6°C and nights cool to about 23.0°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 145 mm of rain on roughly 17 days, which makes March a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 14 min on an average March day.
The nearest other city in this atlas is São Gonçalo (16 km away). In March its highs average 29.0°C, 0.7°C cooler than Rio de Janeiro, with 205 mm of rain.
Among the 448 cities listed in Brazil, Rio de Janeiro ranks joint 77th of 448 for the warmest March highs and joint 183rd of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Rio de Janeiro is 1.7°C warmer than that mean.
From March to April, average highs fall by 1.7°C to 28.0°C, and monthly rainfall falls from 145 mm to 88 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
Rio de Janeiro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.7°C23.5°C | 23.5°C | 170 | 16.4 | 13.413 h |
| February | 31.2°C23.6°C | 23.6°C | 118 | 13.3 | 12.913 h |
| March, selected | 29.6°C23.0°C | 23.0°C | 145 | 16.7 | 12.212 h |
| April | 28.0°C21.4°C | 21.4°C | 88 | 12.0 | 11.612 h |
| May | 25.6°C19.0°C | 19.0°C | 76 | 11.1 | 11.011 h |
| June | 25.2°C17.8°C | 17.8°C | 48 | 7.3 | 10.811 h |
| July | 24.9°C17.1°C | 17.1°C | 51 | 7.9 | 10.911 h |
| August | 25.9°C17.5°C | 17.5°C | 41 | 7.5 | 11.311 h |
| September | 26.8°C18.6°C | 18.6°C | 75 | 10.5 | 11.912 h |
| October | 28.0°C20.0°C | 20.0°C | 92 | 11.7 | 12.613 h |
| November | 28.0°C21.0°C | 21.0°C | 139 | 15.8 | 13.213 h |
| December | 29.7°C22.6°C | 22.6°C | 151 | 16.2 | 13.514 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
- São Gonçalo in MarchBrazil · 16 kmHigh 29.0°C · Low 22.4°C · 205 mm rain
- Duque de Caxias in MarchBrazil · 19 kmHigh 29.7°C · Low 22.6°C · 216 mm rain
- Barra da Tijuca in MarchBrazil · 21 kmHigh 30.1°C · Low 23.3°C · 145 mm rain
- Belford Roxo in MarchBrazil · 27 kmHigh 29.9°C · Low 22.7°C · 171 mm rain
- Magé in MarchBrazil · 32 kmHigh 29.0°C · Low 22.1°C · 205 mm rain
- Nova Iguaçu in MarchBrazil · 32 kmHigh 29.9°C · Low 22.5°C · 171 mm rain
- Maricá in MarchBrazil · 37 kmHigh 29.0°C · Low 23.5°C · 123 mm rain
- Itaboraí in MarchBrazil · 38 kmHigh 28.6°C · Low 21.8°C · 220 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 de Janeiro) is explained once on the Rio de Janeiro year overview and on the Sources, method and limits page.
Barra da Tijuca lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.