Climate averages 1991–2020
Brasília weather
in December.
A warm, very wet month: the joint 7th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Brasília: daytime highs average 25.9°C and nights cool to about 18.4°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 243 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 Águas Claras (12 km away). In December its highs average 25.5°C, about as warm as Brasília, with 243 mm of rain.
Among the 448 cities listed in Brazil, Brasília ranks joint 401st of 448 for the warmest December highs and joint 364th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Brasília is 2.6°C cooler than that mean.
From December to January, average highs rise by 0.1°C to 26.0°C, and monthly rainfall falls from 243 mm to 224 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
Brasília climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.0°C18.4°C | 18.4°C | 224 | 22.7 | 12.913 h |
| February | 26.2°C18.3°C | 18.3°C | 201 | 20.3 | 12.613 h |
| March | 25.9°C18.2°C | 18.2°C | 213 | 21.9 | 12.212 h |
| April | 25.8°C17.5°C | 17.5°C | 96 | 13.8 | 11.812 h |
| May | 25.5°C16.0°C | 16.0°C | 20 | 3.5 | 11.411 h |
| June | 25.0°C14.6°C | 14.6°C | 4.5 | 0.7 | 11.211 h |
| July | 25.2°C14.3°C | 14.3°C | 0.4 | 0.1 | 11.311 h |
| August | 27.0°C15.6°C | 15.6°C | 6.2 | 1.5 | 11.612 h |
| September | 29.0°C17.9°C | 17.9°C | 34 | 5.8 | 12.012 h |
| October | 28.6°C18.8°C | 18.8°C | 123 | 15.3 | 12.412 h |
| November | 26.2°C18.3°C | 18.3°C | 229 | 22.8 | 12.813 h |
| December, selected | 25.9°C18.4°C | 18.4°C | 243 | 24.0 | 13.013 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
- Águas Claras in DecemberBrazil · 12 kmHigh 25.5°C · Low 18.1°C · 243 mm rain
- Riacho Fundo II in DecemberBrazil · 18 kmHigh 25.4°C · Low 17.9°C · 245 mm rain
- Sobradinho II in DecemberBrazil · 19 kmHigh 26.1°C · Low 18.4°C · 218 mm rain
- São Sebastião (Federal District), Brazil in DecemberBrazil · 21 kmHigh 26.3°C · Low 18.5°C · 225 mm rain
- Ceilândia in DecemberBrazil · 22 kmHigh 25.7°C · Low 18.2°C · 244 mm rain
- Samambaia in DecemberBrazil · 22 kmHigh 25.2°C · Low 17.7°C · 245 mm rain
- Santa Maria, Brazil in DecemberBrazil · 30 kmHigh 25.6°C · Low 18.0°C · 245 mm rain
- Gama in DecemberBrazil · 31 kmHigh 26.2°C · Low 18.4°C · 245 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 Brasília) is explained once on the Brasília year overview and on the Sources, method and limits page.
Águas Claras lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.