Climate averages 1991–2020
Três Rios weather
in August.
A warm, fairly dry month: the 9th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Três Rios: daytime highs average 25.5°C and nights cool to about 15.3°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 21 mm of rain on roughly 4 days, which makes August a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 21 min on an average August day.
The nearest other city in this atlas is Teresópolis (41 km away). In August its highs average 21.8°C, 3.7°C cooler than Três Rios, with 49 mm of rain.
Among the 448 cities listed in Brazil, Três Rios ranks joint 243rd of 448 for the warmest August highs and joint 153rd of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Três Rios is 0.7°C cooler than that mean.
From August to September, average highs rise by 1.3°C to 26.8°C, and monthly rainfall rises from 21 mm to 59 mm.
The annual picture
August 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, selected | 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 | 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
August in nearby cities
- Teresópolis in AugustBrazil · 41 kmHigh 21.8°C · Low 12.9°C · 49 mm rain
- Juiz de Fora in AugustBrazil · 42 kmHigh 23.4°C · Low 13.2°C · 30 mm rain
- Petrópolis in AugustBrazil · 43 kmHigh 22.5°C · Low 13.5°C · 42 mm rain
- Valença (Rio de Janeiro), Brazil in AugustBrazil · 53 kmHigh 24.1°C · Low 13.7°C · 30 mm rain
- Magé in AugustBrazil · 62 kmHigh 25.3°C · Low 16.0°C · 44 mm rain
- Nova Friburgo in AugustBrazil · 72 kmHigh 22.6°C · Low 13.7°C · 50 mm rain
- Japeri in AugustBrazil · 74 kmHigh 26.9°C · Low 16.6°C · 35 mm rain
- Barra do Piraí in AugustBrazil · 75 kmHigh 25.3°C · Low 15.1°C · 27 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.