The statewide monthly average temperature of 66.8° was 1.0° above the 1981–2010 mean. The amount of rain in September is high with an average … Average Weather during September in Lakehurst (New Jersey), United States of America. The average minimum temperature (usually the minimum temperature is noted during the night) in Jersey City in September is 15.0°C (59°F). September 2020 was a month of widely-varying temperatures, several episodes of heavy precipitation, and an extended dry spell. Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.. Below are average maximum temperatures at popular destinations in New Jersey in September. Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. The average maximum temperature lies around 23.0°C (73.4°F). The most pleasant months of the year for New Jersey are September, June and August. Each place has a total for the amount of precipitation it usually receives this month. The tables below give monthly averages for rainfall during September at cities, towns and parks in New Jersey. Based on average water temperature observations over the past ten years, the warmest ocean in New Jersey in September was 23.2°C/73.8°F (in Sea Breeze), and the coldest sea 21.6°C/70.9°F (in Bayonne). The amount of rain in September is high with an average of 84mm (3.3in). The average minimum temperature (usually the minimum temperature is noted during the night) in Lakehurst in September is 13.6°C (56.48°F). July is the hottest month for New Jersey with an average high temperature of 85.1°, which ranks it as about average compared to other states. Monthly: 1981-2010 normals In September, Jersey receives an average of 6 hours of sunshine per day. Station Data. This month generally has very pleasant temperatures. During the month, surface water temperature remains constant throughout the month. Cloud cover increases over the course of the month from 44% to 48%. In September sea water temperature throughout New Jersey warms above 20°C/68°F and it is enough for a comfortable bath. Sunshine Hours. Monthly averages Newark Longitude: -74.1724, Latitude: 40.7357 Average weather Newark, NJ - 7101. Average Weather in September in Wildwood New Jersey, United States. The average sea temperature for September is 16°C (61F). New Jersey weather in September 2021. US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Midland/Odessa 2500 Challenger Dr. Midland, TX 79706-2606 Put it all together and conditions averaged quite close to normal. Most sites also have information on the number of days with wet weather. In New Jersey, there are 4 comfortable months with high temperatures in the range of 70-85°. Select a destination to see more weather parameters.