Climate averages 1991–2020
Coari weather
in December.
A hot, very wet month: the joint 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Coari: daytime highs average 29.3°C and nights cool to about 24.2°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 256 mm of rain on roughly 29 days, which makes December a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 21 min on an average December day.
The nearest other city in this atlas is Tefé (192 km away). In December its highs average 29.5°C, about as warm as Coari, with 268 mm of rain.
Among the 448 cities listed in Brazil, Coari ranks joint 154th of 448 for the warmest December highs and 402nd of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Coari is 0.8°C warmer than that mean.
From December to January, average highs fall by 0.2°C to 29.1°C, and monthly rainfall rises from 256 mm to 285 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
Coari climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.1°C24.0°C | 24.0°C | 285 | 28.0 | 12.312 h |
| February | 29.1°C24.0°C | 24.0°C | 278 | 25.4 | 12.212 h |
| March | 29.3°C23.9°C | 23.9°C | 334 | 28.7 | 12.112 h |
| April | 28.8°C23.8°C | 23.8°C | 335 | 28.6 | 12.012 h |
| May | 28.4°C23.7°C | 23.7°C | 297 | 29.1 | 11.912 h |
| June | 28.4°C23.5°C | 23.5°C | 167 | 25.3 | 11.912 h |
| July | 28.9°C23.7°C | 23.7°C | 101 | 20.5 | 11.912 h |
| August | 29.9°C24.3°C | 24.3°C | 96 | 18.6 | 12.012 h |
| September | 30.2°C24.6°C | 24.6°C | 123 | 21.5 | 12.112 h |
| October | 30.3°C24.7°C | 24.7°C | 163 | 24.6 | 12.212 h |
| November | 29.8°C24.5°C | 24.5°C | 211 | 25.6 | 12.312 h |
| December, selected | 29.3°C24.2°C | 24.2°C | 256 | 29.1 | 12.412 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
- Tefé in DecemberBrazil · 192 kmHigh 29.5°C · Low 23.7°C · 268 mm rain
- Manacapuru in DecemberBrazil · 293 kmHigh 29.0°C · Low 24.6°C · 334 mm rain
- Manaus in DecemberBrazil · 363 kmHigh 29.6°C · Low 24.4°C · 289 mm rain
- Porto Velho in DecemberBrazil · 527 kmHigh 29.7°C · Low 23.5°C · 298 mm rain
- Itacoatiara in DecemberBrazil · 532 kmHigh 29.4°C · Low 24.8°C · 268 mm rain
- Ariquemes in DecemberBrazil · 648 kmHigh 29.8°C · Low 22.9°C · 246 mm rain
- Parintins in DecemberBrazil · 729 kmHigh 30.0°C · Low 24.4°C · 245 mm rain
- Ji Paraná in DecemberBrazil · 767 kmHigh 29.5°C · Low 23.0°C · 248 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 Coari) is explained once on the Coari year overview and on the Sources, method and limits page.