Grantham is located in New Hampshire. Grantham, New Hampshire has a population of 2,941. Grantham is more family-centric than the surrounding county with 30.42% of the households containing married families with children. The county average for households married with children is 23.11%.
The median household income in Grantham, New Hampshire is $104,962. The median household income for the surrounding county is $59,419 compared to the national median of $57,652. The median age of people living in Grantham is 47.6 years.
The average high temperature in July is 79.2 degrees, with an average low temperature in January of 6 degrees. The average rainfall is approximately 44.4 inches per year, with 60.1 inches of snow per year.
