Climate averages 1991–2020
Três Rios 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 Três Rios: daytime highs average 27.8°C and nights cool to about 18.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 107 mm of rain on roughly 14 days, which makes October a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 35 min on an average October day.
The nearest other city in this atlas is Teresópolis (41 km away). In October its highs average 24.0°C, 3.7°C cooler than Três Rios, with 150 mm of rain.
Among the 448 cities listed in Brazil, Três Rios ranks joint 250th of 448 for the warmest October highs and joint 204th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Três Rios is 0.5°C cooler than that mean.
From October to November, average highs fall by 0.2°C to 27.5°C, and monthly rainfall rises from 107 mm to 198 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
Três Rios climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C21.5°C | 21.5°C | 232 | 19.3 | 13.313 h |
| February | 30.2°C21.5°C | 21.5°C | 156 | 15.0 | 12.813 h |
| March | 28.9°C21.0°C | 21.0°C | 148 | 17.6 | 12.212 h |
| April | 27.4°C19.5°C | 19.5°C | 57 | 9.6 | 11.612 h |
| May | 25.1°C16.7°C | 16.7°C | 35 | 6.3 | 11.111 h |
| June | 24.5°C15.4°C | 15.4°C | 17 | 3.4 | 10.811 h |
| July | 24.3°C14.9°C | 14.9°C | 18 | 3.7 | 10.911 h |
| August | 25.5°C15.3°C | 15.3°C | 21 | 4.3 | 11.411 h |
| September | 26.8°C17.0°C | 17.0°C | 59 | 8.6 | 12.012 h |
| October, selected | 27.8°C18.8°C | 18.8°C | 107 | 13.5 | 12.613 h |
| November | 27.5°C19.7°C | 19.7°C | 198 | 18.8 | 13.213 h |
| December | 28.9°C20.9°C | 20.9°C | 235 | 21.3 | 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
- Teresópolis in OctoberBrazil · 41 kmHigh 24.0°C · Low 16.2°C · 150 mm rain
- Juiz de Fora in OctoberBrazil · 42 kmHigh 25.7°C · Low 16.7°C · 145 mm rain
- Petrópolis in OctoberBrazil · 43 kmHigh 24.8°C · Low 16.7°C · 137 mm rain
- Valença (Rio de Janeiro), Brazil in OctoberBrazil · 53 kmHigh 26.3°C · Low 17.2°C · 137 mm rain
- Magé in OctoberBrazil · 62 kmHigh 27.4°C · Low 19.3°C · 114 mm rain
- Nova Friburgo in OctoberBrazil · 72 kmHigh 24.7°C · Low 16.8°C · 179 mm rain
- Japeri in OctoberBrazil · 74 kmHigh 29.0°C · Low 20.1°C · 114 mm rain
- Barra do Piraí in OctoberBrazil · 75 kmHigh 27.3°C · Low 18.4°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 Três Rios) is explained once on the Três Rios year overview and on the Sources, method and limits page.