Average Hours of Sunshine: over 2000 per year Average Rainfall: 304.7mm/11in annually (varies by city) Average Snowfall: 139.8cm/55in in the valleys (varies by city). Up to 644cm/253.5in on the mountains Frost Free Days: 120-175 days annually Average maximum temperature (summer): 28.4 C/84 F (it is not unusual for summer temperatures to reach 30C/86 F and higher) Average minimum temperature (winter): -8.8 C/16 F0