Parnaíba Temperature by Month

The average annual maximum temperature in Parnaíba, Piauí, Brazil is 33°C (91°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Parnaíba compares to cities worldwide.

With little seasonal fluctuation, Parnaíba offers a predictable and steady climate. Maximum daytime temperatures reach a very warm 34°C (93°F) in September and a very warm 31°C (88°F) in March. At night, lows range from 25°C (77°F) to 25°C (77°F) throughout the year.

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

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.

The chart below shows the average temperature throughout the year:

Parnaíba'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:

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.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Parnaíba this rarely lasts long on the ground.

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