Rio das Ostras Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Rio das Ostras’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Brazil.

Monthly Temperature Averages

The climate in Rio das Ostras remains fairly constant, offering comfortable temperatures throughout the year. Typically, maximum daytime temperatures range from a very warm 31°C in February to a warm 26°C in the coolest month, July. Nights are cooler, with temperatures generally dropping to 18°C, particularly during the colder months.

The chart below illustrates the average maximum day and minimum night temperatures in Rio das Ostras by month:

The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, when the sun's heating is most intense.

The chart below shows the average temperature throughout the year:

July, the city’s coldest month, sees about 36 mm of rainfall spread over roughly 11 days.

Annual Temperatures in Brazil Compared

The map below shows the annual temperature across Brazil. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 32°C. Warm: 25°C to 32°C. Pleasant: 18°C to 25°C Moderate: 10°C to 18°C. Cold: 5°C to 10°C. Very cold: lower than 5°C

Rio das Ostras Temperatures Compared World Wide

Rio das Ostras’s average annual maximum temperature is 28°C. Let’s compare this with some popular tourist destinations:

Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.

In contrast, in Reykjavík, Iceland, the average annual temperature is significantly lower at 9°C, with mild summers and cold winters.

The climate in San Francisco, USA, is mild, with an average annual temperature of 19°C and minimal seasonal variation.

Adelaide, Australia, enjoys warm summers and mild winters, with an average annual temperature of 21°C.

How does the temperature feel?

Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.

In Rio das Ostras, during the coolest month, July, you will experience 80% humidity, which is considered very high. This is accompanied by an average maximum temperature of 26°C. In the warmest month, February, the humidity is 82% combined with an average maximum temperature of 31°C, which creates a very high-feel temperature. Explore our detailed page on humidity levels for further details.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Temperatures in the Mountains

Although not all regions have mountains, elevated areas exhibit distinct temperature variations.

Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.

For more detailed information about Rio das Ostras’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Rio das Ostras climate page.