Porto Nacional Temperature by Month

Porto Nacional, Brazil has a consistently very warm climate year-round, with daytime highs averaging 33°C (91°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Porto Nacional enjoys a stable climate with temperatures staying pretty much the same throughout the year. Maximum daytime temperatures range from a very warm 31°C (88°F) in January to a very hot 37°C (99°F) in September. Nights are consistently cool, with lows between 24°C (75°F) and 21°C (70°F).

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

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. September, the warmest month, averages 208 hours of sunshine.

The chart below shows the average temperature throughout the year:

Porto Nacional's average annual maximum temperature is 33°C (91°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 Porto Nacional, January is the coolest month, with average highs of 31°C (88°F) and humidity around 83%, considered very high. In September, the warmest month, temperatures average 37°C (99°F) with 56% humidity, conditions that feel moderate. 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 Porto Nacional this rarely lasts long on the ground.

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