Arenal Volcano National Park Weather by Month — Temperature & Rainfall Guide

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

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

In January the weather in Arenal Volcano National Park ranges from pleasant in La Fortuna to perfect in El Castillo de La Fortuna. In El Castillo de La Fortuna you can expect warm maximum average daytime temperatures around 27°C (81°F) and nighttime temperatures around 19°C (66°F). On average, this month is the coldest month of the year in Arenal Volcano National Park.

Find more detailed climate information for Arenal Volcano National Park in January here.

In February the weather in Arenal Volcano National Park is generally perfect. In El Castillo de La Fortuna you can expect warm maximum average daytime temperatures around 28°C (82°F) and nighttime temperatures around 19°C (66°F).

Find more detailed climate information for Arenal Volcano National Park in February here.

In March the weather in Arenal Volcano National Park ranges from pleasant in Nuevo Arenal to perfect in El Castillo de La Fortuna. In El Castillo de La Fortuna you can expect warm maximum average daytime temperatures around 29°C (84°F) and nighttime temperatures around 19°C (66°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 Arenal Volcano National Park in March here.

In April the weather in Arenal Volcano National Park ranges from pleasant in El Castillo de La Fortuna to perfect in La Fortuna. In El Castillo de La Fortuna you can expect very warm maximum average daytime temperatures around 30°C (86°F) and nighttime temperatures around 20°C (68°F). On average, this month is one of the warmest months of the year in Arenal Volcano National Park. So be prepared and make sure to dress lightly.

Find more detailed climate information for Arenal Volcano National Park in April here.

In May the weather in Arenal Volcano National Park ranges from poor in El Castillo de La Fortuna to unpleasant in La Fortuna. In El Castillo de La Fortuna you can expect warm maximum average daytime temperatures around 29°C (84°F) and nighttime temperatures around 21°C (70°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 Arenal Volcano National Park in May here.

In June the weather in Arenal Volcano National Park is generally poor. The average maximum daytime temperatures are high and range from 27°C (81°F) in La Fortuna to 29°C (84°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in June here.

In July the weather in Arenal Volcano National Park ranges from unpleasant in El Castillo de La Fortuna to tolerable in La Fortuna. The average maximum daytime temperatures are high and range from 26°C (79°F) in La Fortuna to 29°C (84°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in July here.

In August the weather in Arenal Volcano National Park is generally unpleasant. The average maximum daytime temperatures are high and range from 27°C (81°F) in La Fortuna to 29°C (84°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in August here.

In September the weather in Arenal Volcano National Park is generally poor. The average maximum daytime temperatures are high and range from 27°C (81°F) in La Fortuna to 29°C (84°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in September here.

In October the weather in Arenal Volcano National Park is generally poor. The average maximum daytime temperatures are high and range from 26°C (79°F) in La Fortuna to 29°C (84°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in October here.

In November the weather in Arenal Volcano National Park ranges from unpleasant in El Castillo de La Fortuna to pleasant in La Fortuna. The average maximum daytime temperatures are high and range from 25°C (77°F) in La Fortuna to 28°C (82°F) in Nuevo Arenal.

Find more detailed climate information for Arenal Volcano National Park in November here.

In December the weather in Arenal Volcano National Park ranges from tolerable in La Fortuna to pleasant in El Castillo de La Fortuna. In El Castillo de La Fortuna you can expect warm maximum average daytime temperatures around 27°C (81°F) and nighttime temperatures around 20°C (68°F). On average, this month is the coldest month of the year in Arenal Volcano National Park.

Find more detailed climate information for Arenal Volcano National Park in December here.