September Weather Calendar 2025 New Jersey. In september jersey city generally has high temperatures with maximum daytime temperatures around 26°c, minimum nighttime temperatures around 17°c and. The average sea water temperature in new jersey in september is 20.2°c (68.4°f) which is comfortable for swimming though some may prefer warmer water.
What is the weather like in september for the 5 most popular destinations in new jersey? Expect 25°c daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in new jersey in september.
September Weather Calendar 2025 New Jersey Images References :