Poasito Temperature by Month

Poasito in Alajuela, Costa Rica enjoys a stable climate, with daytime temperatures staying close to 25°C (77°F) throughout the year. Explore the full monthly breakdown below.

The temperature in Poasito remains steady throughout the year, providing a consistently comfortable climate. Maximum daytime temperatures range from a comfortable 27°C (81°F) in April to a comfortable 24°C (75°F) in January. Nights are mild year-round, with lows ranging from 17°C (63°F) in April to 16°C (61°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Poasito 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. April, the warmest month of the year, receives 241 hours of sunshine.

The chart below shows the average temperature throughout the year:

Poasito's average annual maximum temperature is 25°C (77°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.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

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 Poasito, January is the coolest month, with average highs of 24°C (75°F) and humidity around 68%, considered high. In April, the warmest month, temperatures average 27°C (81°F) with 70% humidity, conditions that feel 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 Poasito this rarely lasts long on the ground.

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