Following a warm Monday air temperatures will start dropping, hovering around zero on Tuesday and falling steeply starting Wednesday. Temperatures of -3..-8C are expected on Thursday morning.
The weekend is to be particularly freezing, with air temps decreasing to -10C at night and -15C in the eastern reaches of the country.
While the days leading up to Wednesday may bring rain and snow, little is expected by way of precipitation starting Thursday.
Killing frost is expected as very dry weather sets in.