Annual Weather Summary: November 2017 to October 2018 Winter will be colder than normal, especially in the south, with the coldest periods from late November into early December and in late December, mid-January, and early February.
It is an adjective that serves to modify nouns. Nouns modified by every are singular and must be written in such a manner. For example: Every <person> involved in the crash died. The reason for this singularity is because the word every literally means each, and refers to a single entity. Moreover, another reason for this is every is derived from the terms everything and everyone.. Notice here that obviously thing and one are singular objects.
The word individual is all about being a single entity that cannot be divided. It can mean person or even personal. A team is made up of individuals, and each individual has individual strengths and weaknesses. Sometimes individual is a way of referring to a person, quasi-formally. You might elevate the phrase This guy walks into my shop, by saying, This individual walks into my shop..