Provided is a canola variety designated 45CM39 and seed, plants and plantparts thereof produced from a cross of inbred varieties. Methods for producingacanola variety comprise crossing canola variety 45CM39 with another canolaplant.Methods for producing a canola plant containing in its genetic material one ormoretraits introgressed into 45CM39 through backcross conversion and/ortransformation,and to the canola seed, plant and plant part produced thereby are described.Canolavariety 45CM39, the seed, the plant produced from the seed, plant parts andvariants,mutants, and minor modifications of canola variety 45CM39 are disclosed.