Idioms describing cold.

Heavy snow: describes heavy snow.

Dripping water into ice: describes that the weather is particularly cold.

Cold wind: biting cold. Describe it as cold.

December: October, November (winter month) and December (twelfth month) of the lunar calendar, with cold weather. Also known as "winter".

Count nine cold days: Count nine. Every nine days from winter to Sunday is a "nine", from one "nine" to nine "nine". Describe a particularly cold winter.

Bitter cold: describes the extremely cold weather.