Climate averages 1991–2020
Petrópolis weather
in October.
A warm, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Petrópolis: daytime highs average 24.8°C and nights cool to about 16.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 137 mm of rain on roughly 15 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 Magé (22 km away). In October its highs average 27.4°C, 2.6°C warmer than Petrópolis, with 114 mm of rain.
Among the 448 cities listed in Brazil, Petrópolis ranks joint 368th of 448 for the warmest October highs and joint 336th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Petrópolis is 3.5°C cooler than that mean.
From October to November, average highs fall by 0.2°C to 24.6°C, and monthly rainfall rises from 137 mm to 252 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
Petrópolis climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C19.6°C | 19.6°C | 315 | 22.9 | 13.313 h |
| February | 27.3°C19.6°C | 19.6°C | 233 | 18.5 | 12.913 h |
| March | 25.9°C19.0°C | 19.0°C | 244 | 22.0 | 12.212 h |
| April | 24.3°C17.4°C | 17.4°C | 105 | 14.0 | 11.612 h |
| May | 22.0°C14.8°C | 14.8°C | 70 | 10.9 | 11.111 h |
| June | 21.6°C13.6°C | 13.6°C | 41 | 7.0 | 10.811 h |
| July | 21.4°C13.0°C | 13.0°C | 39 | 6.6 | 10.911 h |
| August | 22.5°C13.5°C | 13.5°C | 42 | 7.2 | 11.311 h |
| September | 23.8°C15.1°C | 15.1°C | 88 | 10.8 | 11.912 h |
| October, selected | 24.8°C16.7°C | 16.7°C | 137 | 15.1 | 12.613 h |
| November | 24.6°C17.5°C | 17.5°C | 252 | 20.0 | 13.213 h |
| December | 26.1°C18.9°C | 18.9°C | 295 | 23.2 | 13.513 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
- Magé in OctoberBrazil · 22 kmHigh 27.4°C · Low 19.3°C · 114 mm rain
- Teresópolis in OctoberBrazil · 23 kmHigh 24.0°C · Low 16.2°C · 150 mm rain
- Duque de Caxias in OctoberBrazil · 34 kmHigh 28.2°C · Low 19.8°C · 121 mm rain
- Belford Roxo in OctoberBrazil · 37 kmHigh 28.4°C · Low 20.0°C · 96 mm rain
- São Gonçalo in OctoberBrazil · 38 kmHigh 27.4°C · Low 19.6°C · 114 mm rain
- Nova Iguaçu in OctoberBrazil · 40 kmHigh 28.5°C · Low 19.8°C · 96 mm rain
- Itaboraí in OctoberBrazil · 42 kmHigh 27.0°C · Low 19.1°C · 112 mm rain
- Três Rios in OctoberBrazil · 43 kmHigh 27.8°C · Low 18.8°C · 107 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 Petrópolis) is explained once on the Petrópolis year overview and on the Sources, method and limits page.