Seasons and Weather Republic, comprising 4 seasons viz. the period of spring, March - May, summer from June to August , autumn from September to November , winter from December to February because most of Austria's mountains and hills. And also in the center of the mainland. The average annual temperature is in a relatively low level. Especially in the winter, the temperature will drop. In some chilly. Temperature can drop to -10 degrees, but the average temperature for each month are as follows. Source: weather.com Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec for 2 4 9 14 19 22 25 25 21 14 7 4. Low -3 -2 2 5 9 13 15 15 12 6 2 -1.