When I worked for Environment Canada, my first posting was at Eureka. In Feb. 1979, they set the North American record cold mean month temperature of -47.9C (thankfully I arrived in March), so this does line up well with it being the coldest in the USA…
I have to look into this more. At first glance, I notice the dip in 1934 which was an unusually severe Winter in Eastern NA that broke the pattern of years immediately before and after.
When I worked for Environment Canada, my first posting was at Eureka. In Feb. 1979, they set the North American record cold mean month temperature of -47.9C (thankfully I arrived in March), so this does line up well with it being the coldest in the USA…
I have to look into this more. At first glance, I notice the dip in 1934 which was an unusually severe Winter in Eastern NA that broke the pattern of years immediately before and after.