Climate averages 1991–2020
Belford Roxo weather
in December.
A hot, very wet month: the 3rd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Belford Roxo: daytime highs average 30.0°C and nights cool to about 22.5°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 192 mm of rain on roughly 19 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average December day.
The nearest other city in this atlas is Nova Iguaçu (5 km away). In December its highs average 30.0°C, about as warm as Belford Roxo, with 192 mm of rain.
Among the 448 cities listed in Brazil, Belford Roxo ranks joint 93rd of 448 for the warmest December highs and joint 242nd of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Belford Roxo is 1.6°C warmer than that mean.
From December to January, average highs rise by 1.0°C to 31.0°C, and monthly rainfall rises from 192 mm to 235 mm.
The annual picture
December 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
Belford Roxo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.0°C23.4°C | 23.4°C | 235 | 20.0 | 13.413 h |
| February | 31.5°C23.4°C | 23.4°C | 170 | 16.6 | 12.913 h |
| March | 29.9°C22.7°C | 22.7°C | 171 | 19.4 | 12.212 h |
| April | 28.3°C21.1°C | 21.1°C | 85 | 12.0 | 11.612 h |
| May | 25.9°C18.4°C | 18.4°C | 58 | 9.6 | 11.011 h |
| June | 25.6°C17.0°C | 17.0°C | 34 | 5.6 | 10.811 h |
| July | 25.3°C16.3°C | 16.3°C | 34 | 6.1 | 10.911 h |
| August | 26.3°C16.8°C | 16.8°C | 32 | 6.4 | 11.311 h |
| September | 27.3°C18.3°C | 18.3°C | 66 | 9.7 | 11.912 h |
| October | 28.4°C20.0°C | 20.0°C | 96 | 12.9 | 12.613 h |
| November | 28.3°C21.0°C | 21.0°C | 165 | 17.6 | 13.213 h |
| December, selected | 30.0°C22.5°C | 22.5°C | 192 | 19.2 | 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
December in nearby cities
- Nova Iguaçu in DecemberBrazil · 5 kmHigh 30.0°C · Low 22.3°C · 192 mm rain
- Duque de Caxias in DecemberBrazil · 9 kmHigh 29.8°C · Low 22.3°C · 237 mm rain
- Queimados in DecemberBrazil · 17 kmHigh 29.8°C · Low 21.8°C · 192 mm rain
- Barra da Tijuca in DecemberBrazil · 26 kmHigh 30.2°C · Low 23.0°C · 151 mm rain
- Rio de Janeiro in DecemberBrazil · 27 kmHigh 29.7°C · Low 22.6°C · 151 mm rain
- Japeri in DecemberBrazil · 29 kmHigh 30.3°C · Low 22.3°C · 226 mm rain
- Seropédica in DecemberBrazil · 32 kmHigh 29.6°C · Low 21.8°C · 226 mm rain
- São Gonçalo in DecemberBrazil · 36 kmHigh 29.1°C · Low 22.1°C · 229 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 Belford Roxo) is explained once on the Belford Roxo year overview and on the Sources, method and limits page.
Nova Iguaçu and Queimados lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.