Barú Temperature by Month

Barú in Puntarenas, Costa Rica enjoys a stable climate, with daytime temperatures staying close to 26°C (79°F) throughout the year. Explore the full monthly breakdown below.

With little seasonal fluctuation, Barú offers a predictable and steady climate. Maximum daytime temperatures reach a comfortable 27°C (81°F) in March and a comfortable 25°C (77°F) in November. At night, lows range from 21°C (70°F) to 21°C (70°F) throughout the year.

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

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. March, the warmest month, averages 270 hours of sunshine.

The chart below shows the average temperature throughout the year:

Barú'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.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

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

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 Barú, November is the coolest month, with average highs of 25°C (77°F) and humidity around 81%, considered very high. In March, the warmest month, temperatures average 27°C (81°F) with 80% 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.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

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