Mean annual temperatures in the province range between although the thermal amplitude (difference between temperatures in the warmest and coldest months) is large. In summer, mean temperatures in the warmest month (January) range from in the north and northeastern parts to in the west and southwestern parts of the province. Temperatures tend to be cooler in the west owing to the higher altitudes. In winter, mean temperatures in the coldest month (July) range from in the north to in the west and southwest. The northern parts are the warmest parts of the province; absolute maximum temperatures can reach up to . The lowest temperatures ever recorded range from in the northeast to in the southwest.