January weather forecast in Osa

January in Osa is the most freezing month of the year. In January, the weather in Osa is typically freezing. Average daily high temperature in January is about 11 degrees below zero. On average, Osa has 15 snowy, 15 cloudy, and 1 sunny day in January. The snowfalls are usually light. January as well as April, September, and October is considered the most uncomfortable time to visit Osa.