Rio de Janeiro weather in August 2025

Expect daytime maximum temperatures of 25°C in Rio de Janeiro, Brazil in August based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 76 mm of rainfall in the month.

  • 25°C maximum daytime temperature in August in Rio de Janeiro25
    25°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in August in Rio de Janeiro9
    9 days with some rainfall
  • 16°C minimum night-time temperature in August in Rio de Janeiro16
    16°C min night temperature
  • 11 hours of daylight per day in August in Rio de Janeiro11
    11 hours of daylight per day
  • Low heat & humidity in August in Rio de JaneiroL
    Low heat & humidity
  • 76 mm monthly rainfall in August in Rio de Janeiro76
    76 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Rio de Janeiro7
    7 (High) UV index
  • 22°C sea temperature in August in Rio de Janeiro22
    22°C sea temperature

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The August 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.

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

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More about Brazil

How hot is it in Rio de Janeiro in August?

Daytime temperatures usually reach 25°C in Rio de Janeiro in August with low heat and humidity, falling to 16°C at night.

How sunny is it in Rio de Janeiro in August?

There are normally 6 hours of bright sunshine each day in Rio de Janeiro in August - that's 55% of daylight hours.

How warm is the sea around Rio de Janeiro in August?

The average sea temperature around Rio de Janeiro in August is 22°C.

Does it rain in Rio de Janeiro in August?

There are usually 9 days with some rain in Rio de Janeiro in August and the average monthly rainfall is 76mm.

Rio de Janeiro August sunrise & sunset times

Browse the sunrise and sunset times for Rio de Janeiro in August 2025. Select a month to view Rio de Janeiro sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:27 17:32
Saturday, 16th August 2025 06:17 17:38
Sunday, 31st August 2025 06:04 17:43

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