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 maximum daytime temperature in September in Brazil (Rio de Janeiro)25
    25°C max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in September in Brazil (Rio de Janeiro)11
    11 days with some rainfall
  • 17°C minimum night-time temperature in September in Brazil (Rio de Janeiro)17
    17°C min night temperature
  • 12 hours of daylight per day in September in Brazil (Rio de Janeiro)12
    12 hours of daylight per day
  • Low heat & humidity in September in Brazil (Rio de Janeiro)L
    Low heat & humidity
  • 96 mm monthly rainfall in September in Brazil (Rio de Janeiro)96
    96 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Brazil (Rio de Janeiro)10
    10 (Very High) UV index
  • 21°C sea temperature in September in Brazil (Rio de Janeiro)21
    21°C sea temperature

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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.

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Metric (°C / mm)  |  Imperial (°F / inches)

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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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