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() is a township in Essex County, New Jersey, United States. It is the 50th largest municipality in New Jersey by population. As of the United States 2000 Census, the township population was 38,977.
Montclair was first formed as a Township on April 15, 1868, from portions of Bloomfield Township, so that a railroad could be built to Montclair. After a referendum held on February 21, 1894, Montclair was reincorporated as a Town, effective February 24, 1894. In the late 1970s, after protesting for years at the inequities built into the formulas, Montclair joined several other communities to qualify for a pool of federal aid allocated only to Townships, that allowed townships to receive as much as double the revenue-sharing aid per capita received by the four other types of New Jersey municipalities — Borough, City, Town or Village.
Montclair has a temperate climate, with warm/hot humid summers and cool/cold winters, according to the Köppen climate classification humid subtropical climate. January tends to be the coldest month, with average high temperatures in the upper 30's and lows averaging 21. July is the warmest months with high temperatures in the mid 80s and lows in the 70's, the average high is at 86 Fahrenheit. From April to June and from September to early November, Montclair experiences temperatures from the lower 60s to the lower 70s.
Montclair, NJ, gets on average 44 inches (1100 mm) of rain per year, above the US average of 37 inches. Snowfall is common from December to early March, at about 2 inches annually, far below the national average of 35 inches per year. The number of days each year in Montclair with any measurable precipitation is 90, and an average of 202 sunny days.
Montclair is one or two degrees warmer than the neighboring towns of Verona and Cedar Grove because of the mountain between them, which sometimes blocks winds and clouds, including warmer air from the ocean to the east.