Temperatures in Switzerland vary according to altitude. During the winter months from December to February, daytime temperatures in the lowlands average –2 to +7 degrees Centigrade. In spring and autumn, temperatures vary from 8 to 15 degrees Centigrade. During the summer months from June to August, temperatures rise to between 18 and 28 degrees Centigrade. The weather can change very quickly in Switzerland, especially in the mountain regions. Always take along a pullover and umbrella, and protection against sun and rain.