Climate averages 1991–2020
Manaus 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 Manaus: daytime highs average 29.6°C and nights cool to about 24.4°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 289 mm of rain on roughly 28 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 Manacapuru (70 km away). In December its highs average 29.0°C, 0.6°C cooler than Manaus, with 334 mm of rain.
Among the 448 cities listed in Brazil, Manaus ranks joint 131st of 448 for the warmest December highs and 430th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Manaus is 1.1°C warmer than that mean.
From December to January, average highs fall by 0.4°C to 29.2°C, and monthly rainfall rises from 289 mm to 296 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
Manaus climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C24.1°C | 24.1°C | 296 | 28.0 | 12.312 h |
| February | 29.1°C24.0°C | 24.0°C | 296 | 25.5 | 12.212 h |
| March | 29.2°C24.1°C | 24.1°C | 375 | 29.5 | 12.112 h |
| April | 29.0°C24.0°C | 24.0°C | 363 | 28.8 | 12.012 h |
| May | 29.0°C23.9°C | 23.9°C | 312 | 29.1 | 12.012 h |
| June | 29.2°C23.7°C | 23.7°C | 164 | 23.5 | 11.912 h |
| July | 29.6°C23.6°C | 23.6°C | 105 | 19.9 | 12.012 h |
| August | 30.8°C24.1°C | 24.1°C | 99 | 17.3 | 12.012 h |
| September | 31.2°C24.6°C | 24.6°C | 121 | 19.5 | 12.112 h |
| October | 31.3°C24.9°C | 24.9°C | 159 | 21.6 | 12.212 h |
| November | 30.6°C24.8°C | 24.8°C | 193 | 23.6 | 12.312 h |
| December, selected | 29.6°C24.4°C | 24.4°C | 289 | 28.2 | 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
- Manacapuru in DecemberBrazil · 70 kmHigh 29.0°C · Low 24.6°C · 334 mm rain
- Itacoatiara in DecemberBrazil · 176 kmHigh 29.4°C · Low 24.8°C · 268 mm rain
- Coari in DecemberBrazil · 363 kmHigh 29.3°C · Low 24.2°C · 256 mm rain
- Parintins in DecemberBrazil · 369 kmHigh 30.0°C · Low 24.4°C · 245 mm rain
- Itaituba in DecemberBrazil · 467 kmHigh 30.3°C · Low 23.9°C · 209 mm rain
- Oriximiná in DecemberBrazil · 485 kmHigh 30.2°C · Low 25.0°C · 211 mm rain
- Tefé in DecemberBrazil · 522 kmHigh 29.5°C · Low 23.7°C · 268 mm rain
- Santarém in DecemberBrazil · 595 kmHigh 29.9°C · Low 25.7°C · 233 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 Manaus) is explained once on the Manaus year overview and on the Sources, method and limits page.