New Castle, NH enjoys a typical New England climate with four distinct seasons. Winters are cold and snowy, with average temperatures in the low to mid-20s during the day and overnight lows dropping into negative digits at times. Spring brings mild days and plenty of rain, while summers tend to be warm and humid. The average high temperature during the summer months is around 80°F and lows dip down to around 60°F at night. Fall is crisp and cool with temperatures ranging from 40°F-60°F throughout the season.
New Castle, New Hampshire gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.
New Castle averages 53 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 200 sunny days per year in New Castle. The US average is 205 sunny days.
New Castle 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 14
Rain: averages 50 inches of rain a year
Snow: averages 53 inches of snow a year