About Middlesex, NJ

With a population of around 13,900, Middlesex sits in New Jersey, United States. The city operates in the Eastern Time Zone.

Middlesex has a humid continental climate. Average annual temperature is 53°F, with January lows around 21°F and July highs near 86°F. The city averages 45 inches of precipitation per year. The wettest month is typically August; the driest is February.