Mendham Borough, NJ has a humid continental climate with hot summers and cold winters. The average summer temperature is around 81掳F, with temperatures often reaching the 90s during the hottest days of the year. Winters are usually cold, with temperatures dropping to an average low of 28掳F. The spring and fall months typically experience mild and pleasant weather, although there can be occasional fluctuations in temperature. Precipitation is fairly well-distributed throughout the year with average annual rainfall of 45 inches annually. Snowfall is also common in winter months, particularly later in February and March.
Mendham borough, New Jersey gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Mendham borough averages 34 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 205 sunny days per year in Mendham borough. The US average is 205 sunny days.
Mendham borough gets some kind of precipitation, on average, 118 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 82 degrees
Winter Low: the January low is 18
Rain: averages 50 inches of rain a year
Snow: averages 34 inches of snow a year