Climate averages 1991–2020
Manaus weather
in August.
A hot, wet month: the 3rd warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Manaus: daytime highs average 30.8°C and nights cool to about 24.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 99 mm of rain on roughly 17 days, which makes August a wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 01 min on an average August day.
The nearest other city in this atlas is Manacapuru (70 km away). In August its highs average 30.2°C, 0.6°C cooler than Manaus, with 120 mm of rain.
Among the 448 cities listed in Brazil, Manaus ranks joint 70th of 448 for the warmest August highs and 405th of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Manaus is 4.6°C warmer than that mean.
From August to September, average highs rise by 0.4°C to 31.2°C, and monthly rainfall rises from 99 mm to 121 mm.
The annual picture
August 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, selected | 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 | 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
August in nearby cities
- Manacapuru in AugustBrazil · 70 kmHigh 30.2°C · Low 24.8°C · 120 mm rain
- Itacoatiara in AugustBrazil · 176 kmHigh 30.6°C · Low 24.9°C · 89 mm rain
- Coari in AugustBrazil · 363 kmHigh 29.9°C · Low 24.3°C · 96 mm rain
- Parintins in AugustBrazil · 369 kmHigh 30.9°C · Low 24.6°C · 84 mm rain
- Itaituba in AugustBrazil · 467 kmHigh 32.5°C · Low 23.5°C · 52 mm rain
- Oriximiná in AugustBrazil · 485 kmHigh 31.0°C · Low 24.8°C · 70 mm rain
- Tefé in AugustBrazil · 522 kmHigh 29.7°C · Low 23.4°C · 119 mm rain
- Santarém in AugustBrazil · 595 kmHigh 30.2°C · Low 25.7°C · 74 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.