Climate averages 1991–2020
Boa Vista weather
in December.
A hot, moderately wet month: the 6th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Boa Vista: daytime highs average 31.5°C and nights cool to about 24.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 58 mm of rain on roughly 10 days, which makes December a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 58 min on an average December day.
The nearest other city in this atlas is Georgetown (524 km away). In December its highs average 27.2°C, 4.3°C cooler than Boa Vista, with 207 mm of rain.
Among the 448 cities listed in Brazil, Boa Vista ranks joint 40th of 448 for the warmest December highs and joint 66th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Boa Vista is 3.0°C warmer than that mean.
From December to January, average highs rise by 0.6°C to 32.1°C, and monthly rainfall falls from 58 mm to 34 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
Boa Vista climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 32.1°C24.1°C | 24.1°C | 34 | 6.7 | 12.012 h |
| February | 32.5°C24.3°C | 24.3°C | 31 | 5.8 | 12.012 h |
| March | 33.0°C24.6°C | 24.6°C | 59 | 9.1 | 12.112 h |
| April | 31.1°C24.0°C | 24.0°C | 200 | 17.4 | 12.212 h |
| May | 28.8°C23.2°C | 23.2°C | 343 | 26.4 | 12.212 h |
| June | 28.3°C22.7°C | 22.7°C | 310 | 27.3 | 12.312 h |
| July | 28.3°C22.4°C | 22.4°C | 249 | 26.7 | 12.312 h |
| August | 29.3°C22.7°C | 22.7°C | 156 | 22.2 | 12.212 h |
| September | 30.8°C23.2°C | 23.2°C | 94 | 15.4 | 12.112 h |
| October | 31.8°C23.8°C | 23.8°C | 71 | 12.8 | 12.112 h |
| November | 31.6°C24.0°C | 24.0°C | 90 | 13.6 | 12.012 h |
| December, selected | 31.5°C24.1°C | 24.1°C | 58 | 10.3 | 12.012 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
- Georgetown in DecemberGuyana · 524 kmHigh 27.2°C · Low 24.4°C · 207 mm rain
- Upata in DecemberVenezuela · 609 kmHigh 29.3°C · Low 21.7°C · 63 mm rain
- Ciudad Guayana in DecemberVenezuela · 652 kmHigh 29.3°C · Low 22.6°C · 48 mm rain
- Manaus in DecemberBrazil · 662 kmHigh 29.6°C · Low 24.4°C · 289 mm rain
- Ciudad Bolívar in DecemberVenezuela · 670 kmHigh 31.2°C · Low 23.3°C · 37 mm rain
- Manacapuru in DecemberBrazil · 680 kmHigh 29.0°C · Low 24.6°C · 334 mm rain
- Paramaribo in DecemberSuriname · 698 kmHigh 28.7°C · Low 23.8°C · 140 mm rain
- Itacoatiara in DecemberBrazil · 708 kmHigh 29.4°C · Low 24.8°C · 268 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 Boa Vista) is explained once on the Boa Vista year overview and on the Sources, method and limits page.