Arenal Volcano

Arenal Volcano is a mountain located in the San Carlos Canton of Costa Rica, covering an area of 121 square kilometers with an elevation of 1670 meters. It is built of andesite material and is one of the sights of the country on this site, ranking first among the country's sights by English Wikipedia lookups.
Planning a visit
March and April experience lower rainfall compared to the rest of the year, with rain totals of 94 mm on about 6 days and 91 mm on about 12 days respectively, alongside daily highs of 26 °C to 27 °C and lows of 18 °C. Months like July, August, October, and September see significantly higher rain amounts exceeding 400 mm and up to 477 mm on 21 to 26 days.
The nearest airport is La Fortuna Arenal Airport, located 14 km away in La Fortuna, while Juan Santamaría International Airport is 75 km away. The capital, San José, is 90 km away. Nearby places to visit include Monteverde Cloud Forest Reserve at 19.9 km, Lake Arenal at 26.4 km, and Tenorio Volcano National Park at 39.6 km.
Weather by month
The warmest month is April, with an average high of 27 °C. The wettest is October, with about 477 mm of rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | 24 | 25 | 26 | 27 | 26 | 25 | 24 | 25 | 25 | 24 | 24 | 23 |
| Average low, °C | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 |
| Rainfall, mm | 227 | 127 | 94 | 91 | 320 | 429 | 446 | 457 | 443 | 477 | 363 | 320 |
| Rainy days | 6 | 5 | 6 | 12 | 23 | 26 | 21 | 23 | 27 | 27 | 20 | 10 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.