CLIMATE OM COSTA RICA  
     The climate is idyllic. In the lowland- which is dry in the Pacific northwest and humid elsewhere - daytime temperature range in the eighties to nineties degrees. Usually in the seventies at middle elevations, the mercury can fall as low as the forties and fifties at the top of the mountains. Even night time frost is not a uncommon occurrence on the highest peaks. Within  each elevation range, the temperature will   remain relatively constant year-round. Rainfall, on the other hand, is subject to annual and regional patterns. 
     Here are some averages (balance between high and low temperatures) for the temperatures in centergrees and fahrenheit during summertime: