Climate averages 1991–2020
Itacoatiara 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 Itacoatiara: daytime highs average 29.4°C and nights cool to about 24.8°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 268 mm of rain on roughly 26 days, which makes December a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average December day.
The nearest other city in this atlas is Manaus (176 km away). In December its highs average 29.6°C, about as warm as Itacoatiara, with 289 mm of rain.
Among the 448 cities listed in Brazil, Itacoatiara ranks joint 147th of 448 for the warmest December highs and joint 416th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Itacoatiara is 0.9°C warmer than that mean.
From December to January, average highs fall by 0.7°C to 28.6°C, and monthly rainfall rises from 268 mm to 337 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
Itacoatiara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C24.4°C | 24.4°C | 337 | 28.0 | 12.312 h |
| February | 28.6°C24.3°C | 24.3°C | 304 | 25.6 | 12.212 h |
| March | 28.8°C24.4°C | 24.4°C | 366 | 28.2 | 12.112 h |
| April | 28.7°C24.4°C | 24.4°C | 355 | 27.8 | 12.012 h |
| May | 28.7°C24.3°C | 24.3°C | 277 | 28.3 | 12.012 h |
| June | 29.0°C24.3°C | 24.3°C | 155 | 22.6 | 11.912 h |
| July | 29.4°C24.3°C | 24.3°C | 105 | 19.3 | 12.012 h |
| August | 30.6°C24.9°C | 24.9°C | 89 | 15.7 | 12.012 h |
| September | 31.2°C25.2°C | 25.2°C | 109 | 15.8 | 12.112 h |
| October | 31.2°C25.4°C | 25.4°C | 140 | 16.9 | 12.212 h |
| November | 30.4°C25.2°C | 25.2°C | 178 | 20.5 | 12.312 h |
| December, selected | 29.4°C24.8°C | 24.8°C | 268 | 25.8 | 12.312 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
- Manaus in DecemberBrazil · 176 kmHigh 29.6°C · Low 24.4°C · 289 mm rain
- Parintins in DecemberBrazil · 198 kmHigh 30.0°C · Low 24.4°C · 245 mm rain
- Manacapuru in DecemberBrazil · 242 kmHigh 29.0°C · Low 24.6°C · 334 mm rain
- Itaituba in DecemberBrazil · 301 kmHigh 30.3°C · Low 23.9°C · 209 mm rain
- Oriximiná in DecemberBrazil · 325 kmHigh 30.2°C · Low 25.0°C · 211 mm rain
- Santarém in DecemberBrazil · 422 kmHigh 29.9°C · Low 25.7°C · 233 mm rain
- Coari in DecemberBrazil · 532 kmHigh 29.3°C · Low 24.2°C · 256 mm rain
- Altamira in DecemberBrazil · 693 kmHigh 30.4°C · Low 23.8°C · 152 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 Itacoatiara) is explained once on the Itacoatiara year overview and on the Sources, method and limits page.