Climate averages 1991–2020
Rio de Janeiro weather
in October.
A hot, wet month: the joint 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Rio de Janeiro: daytime highs average 28.0°C and nights cool to about 20.0°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 92 mm of rain on roughly 12 days, which makes October a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 36 min on an average October day.
The nearest other city in this atlas is São Gonçalo (16 km away). In October its highs average 27.4°C, 0.6°C cooler than Rio de Janeiro, with 114 mm of rain.
Among the 448 cities listed in Brazil, Rio de Janeiro ranks joint 241st of 448 for the warmest October highs and joint 152nd of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Rio de Janeiro is 0.3°C cooler than that mean.
From October to November, average highs stay level at 28.0°C, and monthly rainfall rises from 92 mm to 139 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
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 | 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, selected | 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
October in nearby cities
- São Gonçalo in OctoberBrazil · 16 kmHigh 27.4°C · Low 19.6°C · 114 mm rain
- Duque de Caxias in OctoberBrazil · 19 kmHigh 28.2°C · Low 19.8°C · 121 mm rain
- Barra da Tijuca in OctoberBrazil · 21 kmHigh 28.5°C · Low 20.5°C · 92 mm rain
- Belford Roxo in OctoberBrazil · 27 kmHigh 28.4°C · Low 20.0°C · 96 mm rain
- Magé in OctoberBrazil · 32 kmHigh 27.4°C · Low 19.3°C · 114 mm rain
- Nova Iguaçu in OctoberBrazil · 32 kmHigh 28.5°C · Low 19.8°C · 96 mm rain
- Maricá in OctoberBrazil · 37 kmHigh 27.1°C · Low 20.6°C · 72 mm rain
- Itaboraí in OctoberBrazil · 38 kmHigh 27.0°C · Low 19.1°C · 112 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.