Arenal weather in December
Mild and comfortable, with frequent heavy rain. Average highs of 18°C and lows of 14°C, with around 27 rainy days expected throughout the month.
While December isn't our top-rated month for Arenal, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
18°C
Average low
14°C
Rainy days
27 days
Best months to visit
Year-round
What to do in Arenal in December
Whatever the weather, Arenal rewards curious visitors. Here are some of the best ways to spend your time:
Arenal volcano hiking and viewing
Natural hot spring soaking in thermal pools
Lake Arenal kayaking and fishing
Hanging bridges and canopy walks through forest
Rainforest night tours and wildlife spotting
Adventure activities: zip-lining, rappelling, canyoning
What to pack for December
Layer up — a mid-weight jacket, jumpers, and comfortable trousers. Waterproof shoes are recommended. Scarves and gloves may be useful in the evenings.
Browse other months
January
19C
Mild and comfortable, with frequent heavy rain.
February
19C
Mild and comfortable, with regular rainfall.
March
20C
Mild and comfortable, with regular rainfall.
April
21C
Mild and comfortable, with regular rainfall.
May
21C
Mild and comfortable, with frequent heavy rain.
June
20C
Mild and comfortable, with frequent heavy rain.
July
20C
Mild and comfortable, with frequent heavy rain.
August
20C
Mild and comfortable, with frequent heavy rain.
September
21C
Mild and comfortable, with frequent heavy rain.
October
20C
Mild and comfortable, with frequent heavy rain.
November
19C
Mild and comfortable, with frequent heavy rain.
December (you are here)
18C
Mild and comfortable, with frequent heavy rain.
Book your December trip to Arenal
Find hotels, tours and experiences for the perfect escape.
