El Castillo de La Fortuna Temperature by Month

El Castillo de La Fortuna, Alajuela, Costa Rica has a consistently comfortable climate year-round, with daytime highs averaging 28°C (82°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Year-round, El Castillo de La Fortuna experiences a consistently comfortable climate. Maximum daytime temperatures range from a very warm 30°C (86°F) in April to a comfortable 27°C (81°F) in the coolest month, January. Nighttime temperatures range from 20°C (68°F) in April to 19°C (66°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in El Castillo de La Fortuna 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 255 hours of sunshine.

The chart below shows the average temperature throughout the year:

El Castillo de La Fortuna's average annual maximum temperature is 28°C (82°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

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.

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 El Castillo de La Fortuna's weather, including monthly rainfall, sunshine hours, and humidity, visit our El Castillo de La Fortuna climate page.