The climate is temperate; the average temperature in June, the coolest month, is about 15°c (59°f), and the average for January, the warmest month, is 25°c (77°f). The weather is transitional between the weather of the humid Argentine pampas and that of southern Brazil. Rainfall is evenly distributed throughout the year; it averages about 105 cm (41 in), varying from 97 cm (38 in) in Montevideo to nearly 127 cm (50 in) farther north. There are from 120 to 180 sunny days a year. Frost is virtually unknown.