Big Arm is located in Montana. Big Arm, Montana has a population of 153. Big Arm is less family-centric than the surrounding county with 20% households with children. The county percentage for households with children is 24%.
The median household income in Big Arm, Montana is $61,731. The median household income for the surrounding county is $47,430 compared to the national median of $61,963. The median age of people living in Big Arm is 52.5 years.
The average high temperature in July is 82.16 degrees, with an average low temperature in January of 20.03 degrees. The annual precipitation is 15.02.