The mean annual temperatures in the province are relatively cold for its latitude owing to the marine currents to the east and higher altitude to the west. Mean annual temperatures in the province can vary, depending on altitude and distance from the sea. The northern parts of the province are the warmest, with a mean annual temperature of more than while the coldest areas are found in the Cordillera where the mean annual temperatures are less than . At the highest peaks, the mean annual temperature is less than freezing. Summer temperatures can exceed although the mean January temperatures range from . In contrast, the Andean region has milder summers with mean January temperatures of or less, depending on the altitude. In July, mean temperatures range from on the coast in the north to around in the central plateau.