Climate averages 1991–2020
Barreiras weather
in December.
A hot, wet month: the 5th 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 Barreiras: daytime highs average 30.7°C and nights cool to about 22.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 143 mm of rain on roughly 15 days, which makes December a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 49 min on an average December day.
The nearest other city in this atlas is Luis Eduardo Magalhães (87 km away). In December its highs average 28.2°C, 2.5°C cooler than Barreiras, with 165 mm of rain.
Among the 448 cities listed in Brazil, Barreiras ranks joint 62nd of 448 for the warmest December highs and joint 130th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Barreiras is 2.2°C warmer than that mean.
From December to January, average highs fall by 0.4°C to 30.2°C, and monthly rainfall falls from 143 mm to 139 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
Barreiras climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.2°C21.8°C | 21.8°C | 139 | 16.4 | 12.713 h |
| February | 30.1°C21.7°C | 21.7°C | 123 | 15.8 | 12.512 h |
| March | 30.1°C21.7°C | 21.7°C | 142 | 16.5 | 12.212 h |
| April | 30.2°C21.6°C | 21.6°C | 68 | 10.2 | 11.812 h |
| May | 30.4°C20.9°C | 20.9°C | 18 | 3.1 | 11.612 h |
| June | 30.1°C19.8°C | 19.8°C | 1.5 | 0.3 | 11.411 h |
| July | 30.2°C19.0°C | 19.0°C | 0.2 | 0.0 | 11.511 h |
| August | 31.7°C19.6°C | 19.6°C | 0.5 | 0.1 | 11.712 h |
| September | 33.8°C21.6°C | 21.6°C | 8.2 | 1.1 | 12.012 h |
| October | 34.1°C23.1°C | 23.1°C | 51 | 6.5 | 12.412 h |
| November | 31.3°C22.5°C | 22.5°C | 154 | 14.1 | 12.713 h |
| December, selected | 30.7°C22.0°C | 22.0°C | 143 | 14.7 | 12.813 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
- Luis Eduardo Magalhães in DecemberBrazil · 87 kmHigh 28.2°C · Low 19.9°C · 165 mm rain
- Guanambi in DecemberBrazil · 332 kmHigh 30.5°C · Low 21.4°C · 104 mm rain
- Irecê in DecemberBrazil · 354 kmHigh 30.0°C · Low 20.4°C · 82 mm rain
- Palmas in DecemberBrazil · 426 kmHigh 30.4°C · Low 23.0°C · 297 mm rain
- Brumado in DecemberBrazil · 426 kmHigh 30.8°C · Low 21.6°C · 89 mm rain
- Janaúba in DecemberBrazil · 445 kmHigh 30.0°C · Low 21.5°C · 157 mm rain
- Gurupi in DecemberBrazil · 446 kmHigh 29.9°C · Low 22.9°C · 266 mm rain
- Formosa, Brazil in DecemberBrazil · 454 kmHigh 27.2°C · Low 19.5°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 Barreiras) is explained once on the Barreiras year overview and on the Sources, method and limits page.