Manaus weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Poor
Best time to visit: June – August
What is the weather like in Manaus in September?
In September, Manaus is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 16 days, totalling 109 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is not an ideal month for a holiday in Manaus.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 44 | 35 | 30 |
| Day | 31° | 32° | 32° |
| Night | 25° | 25° | 25° |
| Sun | 7 h | 7 h | 6 h |
| Rain days | 15 | 16 | 19 |
More details for September
- Daylight
- 12 h 5 min05:53 – 17:58
- UV index
- 14 · extremeclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 24 days30 °C or moreAll months
- Time zone
- UTC−4America/Manaus
How the score comes together
- Temperatureweight 50 %40 %
- Sunshineweight 20 %58 %
- Few rainy daysweight 30 %12 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Manaus in September: quick answers
Is Manaus hot in September?
Yes. In September, Manaus is hot: daytime highs average 32 °C and nights stay around 25 °C. On about 24 days the thermometer climbs to 30 °C or more.
Does it rain much in Manaus in September?
It rains often – on about 16 days, adding up to 109 mm.
Manaus month by month
The whole year in ManausAll destinations: BrazilWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences