Manaus weather in August
In August, Manaus has an average high of 31 °C88 °F and an average low of 25 °C76 °F, with about 50 mm2.0 in of precipitation. It is the 4th warmest month of the year and the driest.
How August compares with other months
Compared with July, August is 1.3 °C2.3 °F warmer on average and drier by 25 mm1.0 in. Compared with September, August is 1.4 °C2.5 °F cooler on average and drier by 18 mm0.7 in. Daylight lasts about 12.0 hours around the middle of the month. Average relative humidity is 79% and the average cloud amount 60%.
Is August a good time to visit Manaus?
Yes — August is one of the most comfortable months to visit Manaus by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in August
For Manaus in August, pack very light, breathable clothing, a sun hat and plenty of water.
August in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Manaus | 3188 | 2576 | 502.0 |
| Manacapuru | 3289 | 2577 | 532.1 |
| Itacoatiara | 3087 | 2475 | 612.4 |
| Parintins | 3189 | 2578 | 602.3 |
| Itaituba | 3289 | 2475 | 481.9 |
| Santarém | 3086 | 2578 | 451.8 |
| Boa Vista | 3087 | 2373 | 1787.0 |
| Porto Velho | 3494 | 2272 | 391.5 |
| Altamira | 3187 | 2272 | 411.6 |
Nearby places that are more than 1 °C1.8 °F cooler: Boa Vista and Altamira.
Other months in Manaus
- January29 °C84 °F / 25 °C76 °F
- February29 °C83 °F / 24 °C76 °F
- March28 °C83 °F / 24 °C76 °F
- April28 °C83 °F / 24 °C76 °F
- May28 °C83 °F / 24 °C76 °F
- June28 °C83 °F / 24 °C75 °F
- July29 °C84 °F / 24 °C75 °F
- August31 °C88 °F / 25 °C76 °F
- September33 °C91 °F / 25 °C78 °F
- October33 °C91 °F / 26 °C79 °F
- November32 °C89 °F / 26 °C78 °F
- December30 °C85 °F / 25 °C77 °F
Frequently asked questions
How warm is Manaus in August?
In August the average high in Manaus is 31 °C (88 °F) and the average low is 25 °C (76 °F).
Does it rain a lot in Manaus in August?
On average about 50 mm (2.0 in) of precipitation falls in August; it ranks 12th of the 12 months.
Is August the warmest month in Manaus?
No. The warmest month in Manaus is September, with an average high of 33 °C (91 °F). The coldest month is July, with an average low of 24 °C (75 °F).
How long is the day in Manaus in August?
In the middle of August the day in Manaus lasts about 12.0 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Manaus in August?
The average relative humidity in August is about 79%. Combined with warm days, it can feel muggy.
How cloudy is Manaus in August?
On average about 60% of the sky is covered by cloud in August. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.