Grantham is located in New Hampshire. Grantham, New Hampshire has a population of 3,366. Grantham is more family-centric than the surrounding county with 34.38% of the households containing married families with children. The county average for households married with children is 22.86%.
The median household income in Grantham, New Hampshire is $147,313. The median household income for the surrounding county is $64,587 compared to the national median of $69,021. The median age of people living in Grantham is 50.1 years.
The average high temperature in July is 78.8 degrees, with an average low temperature in January of 8 degrees. The average rainfall is approximately 47.2 inches per year, with 70.7 inches of snow per year.
