Alajuela Weather by Month — Temperature & Rainfall Guide

Alajuela is a region in Costa Rica. Many people wonder what the weather conditions are in Alajuela over the year. What is the best time to visit Alajuela?

This page shows the average weather conditions by month in Alajuela over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Alajuela ranges from tolerable in El Achiote to perfect in Alajuela. The average maximum daytime temperatures are high and range from 24°C (75°F) in Río Segundo to 30°C (86°F) in San Mateo. On average, this month is the coldest month of the year in Alajuela.

Find more detailed climate information for Alajuela in January here.

In February the weather in Alajuela ranges from pleasant in Bijagua to perfect in Fortuna. The temperatures range from high in Río Segundo with 24°C (75°F) to very high in San Mateo with 31°C (88°F).

Find more detailed climate information for Alajuela in February here.

In March the weather in Alajuela ranges from pleasant in Bijagua to perfect in Fortuna. The temperatures range from high in Río Segundo with 25°C (77°F) to very high in San Mateo with 31°C (88°F).

Find more detailed climate information for Alajuela in March here.

In April the weather in Alajuela ranges from tolerable in San Mateo to perfect in Alajuela. The temperatures range from high in Birrí with 26°C (79°F) to very high in Los Chiles with 32°C (90°F). On average, this month is one of the warmest months of the year in Alajuela. So be prepared and make sure to dress lightly.

Find more detailed climate information for Alajuela in April here.

In May the weather in Alajuela ranges from poor in Fortuna to unpleasant in La Fortuna. The temperatures range from high in Birrí with 26°C (79°F) to very high in Los Chiles with 32°C (90°F). These night and day temperatures are an average and some days may be even warmer. So be prepared and bring light clothes.

Find more detailed climate information for Alajuela in May here.

In June the weather in Alajuela is generally poor. The temperatures range from high in Birrí with 25°C (77°F) to very high in Los Chiles with 31°C (88°F).

Find more detailed climate information for Alajuela in June here.

In July the weather in Alajuela ranges from poor in Fortuna to tolerable in La Fortuna. The temperatures range from high in Birrí with 25°C (77°F) to very high in Los Chiles with 30°C (86°F).

Find more detailed climate information for Alajuela in July here.

In August the weather in Alajuela ranges from poor in Fortuna to unpleasant in El Castillo de La Fortuna. The temperatures range from high in Birrí with 25°C (77°F) to very high in Los Chiles with 30°C (86°F).

Find more detailed climate information for Alajuela in August here.

In September the weather in Alajuela is generally poor. The temperatures range from high in Birrí with 25°C (77°F) to very high in Los Chiles with 31°C (88°F).

Find more detailed climate information for Alajuela in September here.

In October the weather in Alajuela is generally poor. The temperatures range from high in Birrí with 25°C (77°F) to very high in Los Chiles with 30°C (86°F).

Find more detailed climate information for Alajuela in October here.

In November the weather in Alajuela ranges from poor in Fortuna to pleasant in Fortuna. The average maximum daytime temperatures are high and range from 24°C (75°F) in Birrí to 30°C (86°F) in Los Chiles.

Find more detailed climate information for Alajuela in November here.

In December the weather in Alajuela ranges from poor in Hacienda Tres Amigos to perfect in La Garita. The average maximum daytime temperatures are high and range from 24°C (75°F) in Birrí to 29°C (84°F) in Los Chiles.

Find more detailed climate information for Alajuela in December here.