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Brazil weather in September 2025
Expect daytime maximum temperatures of 25°C in Brazil in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 11 days with some rainfall and typically 96 mm of rainfall in the month.
- 25°C max day temperature
25 - 5 hours of sunshine per day
- 11 days with some rainfall
11 - 17°C min night temperature
17 - 12 hours of daylight per day
12 - Low heat & humidity
L - 96 mm of monthly rainfall
96 - 10 (Very High) UV index
10 - 21°C sea temperature
21
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Recommended for Brazil
The September weather guide for Brazil (Rio de Janeiro) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Top Brazil destinations
Below are average maximum temperatures at popular countries, regions and places in Brazil in September. Select a holiday destination to see more weather parameters.
All Brazil destinations
- Angra Dos Reis
- Belem
- Belo Horizonte
- Boa Vista
- Brasilia
- Buzios
- Caceres
- Campinas
- Campo Grande
- Costa do Sauipe
- Cuiaba
- Curitiba
- Fernando de Noronha
- Florianopolis
- Fortaleza
- Foz do Iguacu
- Guaruja
- Ilheus
- Macapa
- Maceio
- Manaus
- Marau Peninsular
- Natal
- Paraty
- Pipa
- Ponta Negra
- Porto Alegre
- Porto Seguro
- Porto Velho
- Praia Do Forte
- Recife
- Rio de Janeiro
- Salvador
- Sao Luis
- Sao Paulo
- Tabatinga
- Via Costeira
Metric (°C / mm) | Imperial (°F / inches)
More about Brazil
How hot is it in Brazil in September?
Daytime temperatures usually reach 25°C in Rio de Janeiro, Brazil in September with low heat and humidity, falling to 17°C at night.
How sunny is it in Brazil in September?
There are normally 5 hours of bright sunshine each day in Rio de Janeiro, Brazil in September - that's 40% of daylight hours.
How warm is the sea around Brazil in September?
The average sea temperature around Rio de Janeiro, Brazil in September is 21°C.
Does it rain in Brazil in September?
There are usually 11 days with some rain in Rio de Janeiro, Brazil in September and the average monthly rainfall is 96mm.
Brazil September sunrise & sunset times
Browse the sunrise and sunset times for Brazil in September 2025. Select a month to view Brazil sunrise and sunset times for the next 12 months. The Brazil sunrise and sunset times shown below are for Rio de Janeiro.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Monday, 1st September 2025 | 06:03 | 17:43 |
| Monday, 15th September 2025 | 05:49 | 17:47 |
| Tuesday, 30th September 2025 | 05:34 | 17:52 |
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