Cabo Frio Temperature by Month

The average annual maximum temperature in Cabo Frio, Rio de Janeiro State, Brazil is 26°C (79°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Cabo Frio compares to cities worldwide.

Cabo Frio enjoys a stable climate with temperatures staying pretty much the same throughout the year. Maximum daytime temperatures range from a comfortable 24°C (75°F) in August to a comfortable 28°C (82°F) in February. Nights are consistently cool, with lows between 24°C (75°F) and 20°C (68°F).

The chart below illustrates the average maximum day and minimum night temperatures in Cabo Frio by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest.

The chart below shows the average temperature throughout the year:

Cabo Frio's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Cabo Frio, August is the coolest month, with average highs of 24°C (75°F) and humidity around 81%, considered very high. In February, the warmest month, temperatures average 28°C (82°F) with 82% humidity, conditions that feel very high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Cabo Frio this rarely lasts long on the ground.

For more on Cabo Frio's weather, including monthly rainfall, sunshine hours, and humidity, visit our Cabo Frio climate page.