When you're dreaming of a getaway to Casnovia, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually July and August, with an average temperature of 20°C, while the coldest months are January and February, with an average of -2°C. The snowiest months in Casnovia are January, March, February and December, with each month seeing an average of 29 cm of snowfall.