I have a 3' x 3' opening in front of my house that needs to be
cemented. But someone told me that it cannot be done or shouldn't be
done in winter weather below 32 degrees. if true, than what would be
the accepted temp and how does one know the exact temp on the spot
where its suppose to be done...thermometers are unreliable..also, when
one hears on the radio a certain temp, it is not necessarily the same
temp where one lives , even if one lives in the same city.