Big Arm is located in Montana. Big Arm, Montana has a population of 82. Big Arm is more family-centric than the surrounding county with 100% of the households containing married families with children. The county average for households married with children is 23.84%.
The median household income for the surrounding county is $53,154 compared to the national median of $69,021. The median age of people living in Big Arm is 29.7 years.
The average high temperature in July is 81.8 degrees, with an average low temperature in January of 22.8 degrees. The average rainfall is approximately 17.7 inches per year, with 43.2 inches of snow per year.