When planning a visit to Arenal Volcano National Park in Costa Rica, it helps to know that temperatures typically range from 27°C (81°F) in January up to 30°C (86°F) during the peak of April. Our detailed climate overview is based on data from El Castillo de La Fortuna, the region's most well-known city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Arenal Volcano National Park, no particular months stand out for consistently comfortable weather, as average temperatures fluctuate year-round.
When it comes to rainfall, Arenal Volcano National Park sees significant variations throughout the year. October tends to be the wettest, receiving 335 mm (13 in) of rain, while March is much drier with just 29 mm (1.1 in). Travelers should note that the rainy season falls during May, June, July, August, September, October and November, bringing substantial precipitation ranging from 250 mm (9.8 in) to 335 mm (13 in) monthly.
Visitors hoping to maximize their time in the sun should consider planning their trip for March, when daylight hours are at their peak.
