Alajuela Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alajuela.
Climate overview of Alajuela
Alajuela, Alajuela, Costa Rica, enjoys a steady climate throughout the year, with daytime temperatures typically around 26°C (79°F). April is the warmest month at 27°C (81°F), while January is the coolest at 25°C (77°F).
With around 2813 mm (111 in) of annual rainfall, Alajuela has a notably wet climate. However, this rainfall is not evenly distributed — the city has distinct dry (February to March) and wet (May to November) seasons. The wettest month is October. The most sunshine falls in March, with an average of 9.5 hours of daily sunshine.
Alajuela Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alajuela — and find the best time to visit.
Monthly Temperature in Alajuela
The temperature in Alajuela remains steady throughout the year, providing a consistently comfortable climate. Average daytime temperatures reach a comfortable 27°C (81°F) in April. In January, the coolest month of the year, temperatures drop to a comfortable 25°C (77°F).
At night, temperatures range from around 18°C (64°F) in April to 16°C (61°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alajuela
Alajuela has a relatively rainy climate with high precipitation levels, averaging 2813 mm (111 in) of rainfall annually. Alajuela can be quite wet during October, receiving approximately 442 mm (17 in) of precipitation over 23 rainy days.
In contrast, during the driest month (March), you will experience much drier conditions, with 36 mm (1.4 in) of precipitation spread across 8 rainy days days. For more details, please visit our Alajuela Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Alajuela
Alajuela can be enjoyed more throughout the sunniest month of March under a blue sky, with approximately 9.5 hours of sunshine daily. In contrast, the city experiences much darker days in June, with only 4.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Alajuela by Month
The relative humidity is high throughout the year in Alajuela.
The city experiences its highest humidity in October, reaching 87%. In March, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Alajuela
Rainfall during this time ranges from 36 mm (1.4 in) in March to 102 mm (4 in) in December. This means you can expect a mix of sunny days and occasional showers.
The rainy season falls during May, June, July, August, September, October and November, bringing heavy precipitation. Wondering where to travel based on your weather preferences? Our recommendation tool helps you find destinations with your ideal climate conditions. Use our weather planner to find your perfect destination.
Frequently asked questions about the climate in Alajuela
What is the best time to visit Alajuela?
January, February, March and April typically offer the most optimal weather in Alajuela. In contrast, May, June, July, August, September and October tend to have less optimal conditions. Alajuela has distinct dry (February to March) and wet (May to November) seasons.
What temperatures can I expect in Alajuela?
Daytime highs range from 25°C (77°F) in January to 27°C (81°F) in April. Nighttime lows range from 16°C (61°F) to 18°C (64°F). Temperatures stay relatively stable year-round.
How much rain does Alajuela get?
Annual rainfall is around 2813 mm (111 in). October is the wettest month with 442 mm (17 in), while March is the driest with 36 mm (1.4 in).
How sunny is Alajuela?
Alajuela receives around 2,446 hours of sunshine per year. March is the sunniest month with 284 hours, while June is the cloudiest with just 145 hours. Overall, Alajuela enjoys abundant sunshine.
Alajuela 3-Day Forecast
Alajuela 3-Day Forecast
Alajuela on the map
Alajuela is highlighted — select any city to see its climate.
Popular this month
Where to go in June — average daytime high across popular destinations.
Tamarindo
31°C (88°F) Cahuita29°C (84°F) Santa Teresa29°C (84°F) Herradura29°C (84°F) Puerto Viejo de Talamanca29°C (84°F) Fortuna29°C (84°F) Jacó29°C (84°F) San José25°C (77°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Where the rain forest meets the ocean
I promise that you will not find a better location, better views, nicer rooms or lovelier staff anywhere in Costa Rica. This place really goes above and beyond.
Exploring Santa Teresa, Costa Rica: A Traveler's Guide
Immerse yourself in the laid-back charm of Santa Teresa, Costa Rica. Discover stunning beaches, vibrant dining spots, unique shops, and diverse activities in our comprehensive guide
Envision Festival
This event happens once a year in Uvita de Puntarenas and attracts people from all over the world. This festival is a must add to your bucket list.
Costa Rica Is Top Of The Happy Planet Index: Here's Why
Costa Rica has been crowned top of The Happy Planet Index — officially becoming the happiest, greenest country in the world. But what is it that makes this small but mighty Central American country so amazing?