Londonderry Real EstateLondonderry real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Londonderry real estate agent to arrange a tour today! Londonderry, Pennsylvania has a population of 3,765. The median household income in Londonderry, Pennsylvania is $75,802. The median household income for the surrounding county is $65,390 compared to the national median of $57,652. The median age of people living in Londonderry is 46.8 years. Londonderry WeatherThe average high temperature in July is 84.2 degrees, with an average low temperature in January of 19.2 degrees. The average rainfall is approximately 48.9 inches per year, with 29.9 inches of snow per year. Nearby Homes for Sale |