Climate averages 1991–2020
Riacho Fundo II weather
in December.
A warm, very wet month: the 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Riacho Fundo II: daytime highs average 25.4°C and nights cool to about 17.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 245 mm of rain on roughly 24 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 03 min on an average December day.
The nearest other city in this atlas is Samambaia (6 km away). In December its highs average 25.2°C, about as warm as Riacho Fundo II, with 245 mm of rain.
Among the 448 cities listed in Brazil, Riacho Fundo II ranks joint 419th of 448 for the warmest December highs and joint 371st of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Riacho Fundo II is 3.0°C cooler than that mean.
From December to January, average highs rise by 0.1°C to 25.5°C, and monthly rainfall falls from 245 mm to 230 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
Riacho Fundo II climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.5°C17.8°C | 17.8°C | 230 | 22.3 | 13.013 h |
| February | 25.7°C17.8°C | 17.8°C | 195 | 19.9 | 12.613 h |
| March | 25.5°C17.7°C | 17.7°C | 214 | 21.8 | 12.212 h |
| April | 25.3°C17.0°C | 17.0°C | 93 | 13.3 | 11.712 h |
| May | 25.0°C15.4°C | 15.4°C | 21 | 3.4 | 11.411 h |
| June | 24.5°C14.0°C | 14.0°C | 4.7 | 0.8 | 11.211 h |
| July | 24.7°C13.7°C | 13.7°C | 0.3 | 0.1 | 11.311 h |
| August | 26.6°C15.0°C | 15.0°C | 6.4 | 1.5 | 11.612 h |
| September | 28.6°C17.4°C | 17.4°C | 35 | 5.5 | 12.012 h |
| October | 28.2°C18.3°C | 18.3°C | 122 | 14.8 | 12.412 h |
| November | 25.7°C17.8°C | 17.8°C | 226 | 22.5 | 12.813 h |
| December, selected | 25.4°C17.9°C | 17.9°C | 245 | 23.8 | 13.113 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
- Samambaia in DecemberBrazil · 6 kmHigh 25.2°C · Low 17.7°C · 245 mm rain
- Águas Claras in DecemberBrazil · 7 kmHigh 25.5°C · Low 18.1°C · 243 mm rain
- Ceilândia in DecemberBrazil · 13 kmHigh 25.7°C · Low 18.2°C · 244 mm rain
- Gama in DecemberBrazil · 14 kmHigh 26.2°C · Low 18.4°C · 245 mm rain
- Santa Maria, Brazil in DecemberBrazil · 15 kmHigh 25.6°C · Low 18.0°C · 245 mm rain
- Brasília in DecemberBrazil · 18 kmHigh 25.9°C · Low 18.4°C · 243 mm rain
- Valparaíso de Goiás in DecemberBrazil · 20 kmHigh 26.2°C · Low 18.4°C · 245 mm rain
- Santo Antônio do Descoberto in DecemberBrazil · 23 kmHigh 27.1°C · Low 19.4°C · 225 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 Riacho Fundo II) is explained once on the Riacho Fundo II year overview and on the Sources, method and limits page.
Samambaia, Valparaíso de Goiás and Gama lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.