Winter grease for extreme cold temperatures
I use Agrinol 158, which works down to -50&deg;C. It's a blue color. It is an automotive lithium-based grease and I do not think it was specifically tested for bicycle applications; however, at -37°C it does not matter really as long as it works for someone. The "NLGI 1;2" on the can refers to the NLGI consistency number  meaning it is a "soft" grease with medium viscosity. Maybe you can find an analog where you are.