Guanacaste Weather by Month — Temperature & Rainfall Guide

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

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

In January the weather in Guanacaste is generally excellent. The temperatures range from high in Nuevo Arenal with 28°C (82°F) to very high in Nicoya with 33°C (91°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 Guanacaste in January here.

In February the weather in Guanacaste is generally excellent. The temperatures range from high in Nuevo Arenal with 28°C (82°F) to very high in Nicoya with 35°C (95°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 Guanacaste in February here.

In March the weather in Guanacaste ranges from very good in Nuevo Arenal to excellent in Tamarindo. The temperatures range from high in Nuevo Arenal with 30°C (86°F) to extremely high in Nicoya with 35°C (95°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 Guanacaste in March here.

In April the weather in Guanacaste ranges from mixed in Liberia to excellent in Coco. The temperatures range from very high in Puerto Coyote with 31°C (88°F) to extremely high in Nicoya with 36°C (97°F). On average, this month is one of the warmest months of the year in Guanacaste. So be prepared and make sure to dress lightly.

Find more detailed climate information for Guanacaste in April here.

In May the weather in Guanacaste ranges from less favorable in Tamarindo to mixed in La Cruz. The temperatures range from high in Puerto Coyote with 30°C (86°F) to very high in Liberia with 33°C (91°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 Guanacaste in May here.

In June the weather in Guanacaste is generally less favorable. The temperatures range from high in Puerto Coyote with 29°C (84°F) to very high in Nicoya 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 Guanacaste in June here.

In July the weather in Guanacaste ranges from less favorable in Sámara to very good in La Cruz. The temperatures range from high in Nuevo Arenal with 29°C (84°F) to very high in Nicoya 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 Guanacaste in July here.

In August the weather in Guanacaste ranges from less favorable in Tamarindo to good in Ocotal. The temperatures range from high in Puerto Coyote with 29°C (84°F) to very high in Nicoya 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 Guanacaste in August here.

In September the weather in Guanacaste is generally less favorable. The temperatures range from high in Puerto Coyote with 29°C (84°F) to very high in Nicoya with 31°C (88°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 Guanacaste in September here.

In October the weather in Guanacaste is generally less favorable. The temperatures range from high in Puerto Coyote with 29°C (84°F) to very high in Nicoya with 31°C (88°F). On average, this month is the coldest month of the year in Guanacaste.

Find more detailed climate information for Guanacaste in October here.

In November the weather in Guanacaste ranges from less favorable in Nosara to very good in Fortuna. The temperatures range from high in Nuevo Arenal with 28°C (82°F) to very high in Nicoya with 31°C (88°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 Guanacaste in November here.

In December the weather in Guanacaste ranges from very good in Sámara to excellent in Tamarindo. The temperatures range from high in Nuevo Arenal with 28°C (82°F) to very high in Nicoya 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 Guanacaste in December here.