Climate averages 1991–2020
Três Rios weather
in January.
A hot, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Três Rios: daytime highs average 29.6°C and nights cool to about 21.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 232 mm of rain on roughly 19 days, which makes January a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 19 min on an average January day.
The nearest other city in this atlas is Teresópolis (41 km away). In January its highs average 26.1°C, 3.5°C cooler than Três Rios, with 328 mm of rain.
Among the 448 cities listed in Brazil, Três Rios ranks joint 111th of 448 for the warmest January highs and joint 251st of 448 for the driest January (rainfall, lowest first). The mean January high of those 448 cities is 28.5°C; Três Rios is 1.2°C warmer than that mean.
From January to February, average highs rise by 0.6°C to 30.2°C, and monthly rainfall falls from 232 mm to 156 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Teresópolis in JanuaryBrazil · 41 kmHigh 26.1°C · Low 19.1°C · 328 mm rain
- Juiz de Fora in JanuaryBrazil · 42 kmHigh 27.4°C · Low 19.3°C · 342 mm rain
- Petrópolis in JanuaryBrazil · 43 kmHigh 26.9°C · Low 19.6°C · 315 mm rain
- Valença (Rio de Janeiro), Brazil in JanuaryBrazil · 53 kmHigh 28.2°C · Low 20.0°C · 302 mm rain
- Magé in JanuaryBrazil · 62 kmHigh 30.1°C · Low 22.7°C · 244 mm rain
- Nova Friburgo in JanuaryBrazil · 72 kmHigh 26.9°C · Low 19.8°C · 332 mm rain
- Japeri in JanuaryBrazil · 74 kmHigh 31.3°C · Low 23.1°C · 273 mm rain
- Barra do Piraí in JanuaryBrazil · 75 kmHigh 29.4°C · Low 21.2°C · 282 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.