Just a note for anyone using JetA from the States. I have been operating out of there for many years and we pay to have the actual fuel freeze temperatures checked. This involves taking three samples, one at the start, one during and one at the end of refueling. The worse case of the three is the declared as the fuel freeze temperature for fuel loaded. I have never come across any JetA fuel that would freeze below -45C and it is often much better than that.