New Brunswick Average Temperature by Month

This page shows the average temperature in each month of the year in New Brunswick, New Jersey. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in New Brunswick?
In New Brunswick, New Jersey, the warmest month is July, with an average daily high temperature of 86.5 °F and an average low of 65.3 °F.
What's the Coldest Month in New Brunswick?
In New Brunswick, New Jersey, the coolest month is January, with an average daily high temperature of 40.3 °F and an average low of 22.6 °F.
Month Avg. High Avg. Low
January 40.3 °F 22.6 °F
February 42.9 °F 23.8 °F
March 50.6 °F 31.0 °F
April 62.6 °F 40.6 °F
May 72.1 °F 50.4 °F
June 81.2 °F 59.9 °F
July 86.5 °F 65.3 °F
August 84.7 °F 63.7 °F
September 78.4 °F 56.5 °F
October 66.6 °F 44.1 °F
November 55.5 °F 35.0 °F
December 45.4 °F 28.1 °F
Year 64.0 °F 43.5 °F
Weather Station Details
Years Station Coordinates
1968–2024 New Brunswick 3 SE location
1896–1967 New Brunswick Experimental Station location