Wildlife can be seen throughout the year, but the dry season can make certain animals easier to spot because they gather around water sources.
Due to the increased demand, prices for accommodations, tours, and even some restaurants can be more expensive in January
Because this is peak tourist season, you’ll encounter larger crowds at popular destinations, such as beaches and national parks.
The Costa Rican school year ends for summer vacation. So a lot of locals will be traveling as well (roads are busier, more things are booked out etc.)
Popular hotels, resorts, and tours can get fully booked well in advance for January. If you don’t plan ahead, you might miss out on your top choices.