: October in Minnesota is leaving me with cold nights and cool days. Since my
: house doesn't have 20ft ceilings I'll have to do my end pours outdoors.

: Is there a minimum air temperature below which I need to wait for spring? I'm
: using MAS epoxy.

Place the end in a bucket of hot water. This will make the epoxy warm enough despite the outside temperature while also assuring it doesn't get too hot. Just be sure that there are no leaks in the end of the boat.