What is the weather like in Costa Rica year-round?

Costa Rica enjoys mild, subtropical weather with little variety year-round. The most variation comes from differences in elevation. For example, evenings are cool in San Jose and Monteverde. Daytime temperatures range from 70 degrees to 90. The lowlands average around 80-90 F, the Central Valley about 72 while it can dip below 50 in the mountains at night!