Manaus weather in August
In August, Manaus has daytime highs averaging 31 °C, nights around 24 °C, with 17 wet days. Figures are 1991–2020 climate normals.
- 30.7°C Average high
- 24.1°C Average low
- 17days Wet days
- 96mm Rainfall
- 12h Daylight
Daily temperatures through August
How August develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 August | 30.6 °C | 23.9 °C | 46 % |
| 11–20 August | 30.6 °C | 24.1 °C | 56 % |
| 21–31 August | 30.9 °C | 24.3 °C | 56 % |
- Rain is most likely over days 11–20 of August (56 % of days) and least likely over days 1–10 (46 %).
What to expect
| Measure | Typical August | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 100 % |
| Days above 30 °C | 20 of 31 | 64 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 17 of 31 | 53 % |
Conditions in August
| Measure | Average |
|---|---|
| Mean temperature | 27 °C |
| Record high (1991–2020) | 36 °C |
| Record low (1991–2020) | 21 °C |
| Relative humidity | 82 % |
| Wind speed | 9.6 km/h |
| Cloud cover | 53 % |
Where Manaus ranks in August
| Ranking | Position | Value |
|---|---|---|
| The warmest places in South America in August | 49thof 50 | 31 °C |
August compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| June | 29.1 °C | 162 mm | 66 % |
| July | 29.5 °C | 104 mm | 55 % |
| August | 30.7 °C | 96 mm | 53 % |
| September | 31.1 °C | 116 mm | 64 % |
| October | 31.1 °C | 148 mm | 74 % |
See all twelve months for Manaus
- August is the 3rd warmest month here.
- It is the 1st driest month of the year.
- It ranks 1st for least cloud cover.
- Days last about 12 hours from sunrise to sunset.
- It rains on 17 of 31 days — 53 % of the month.
- Nights are about 6.6 °C cooler than the middle of the day.
- The hottest August day on record since 1991 reached 36 °C, 5.2 °C above the usual daytime high.
Nearby destinations in August
| Destination | Avg high | Wet days |
|---|---|---|
| Manaus | 31 °C | 17 |
| Santarém | 30 °C | 12 |
QuestionsAugust in Manaus, answered
How warm is Manaus in August?
Daily highs average 31 °C and nights fall to about 24 °C, a spread of 6.6 °C between afternoon and dawn. That makes August the 4th warmest month of the year here.
Does it rain much in Manaus in August?
August averages 96 mm of rain, spread over about 17 of the 31 days — 53 % of the month. Cloud cover averages 53 % of the sky.
How long are the days in August?
Manaus averages 12 hours between sunrise and sunset in August. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.