My sister is the same way. She can't sleep if the room is colder than 75F/23.8C....

ScottFree on Sept 5, 2019 | parent | context | favorite | on: Weighted blankets might ease insomnia and anxiety

My sister is the same way. She can't sleep if the room is colder than 75F/23.8C. My brother and I can't sleep if the room is warmer than 60F/15.5C. My personal theory is that my brother and I have more brown fat due to being active outside in the winter, even when it's -40F/-40C.