Ideally you want to prune roses before they break dormancy and after springs final frost.  In Prescott Valley plants tend to break dormancy before the final spring frost.  A winter mulching will help keep the roses in dormancy through PV’s late winter & spring’s temperature swings.  February is a good happy medium on major pruning.  Summer pruning is immediately after flowering & is a light pruning, really just deadheading the flower right above the first leaflet with 5 leaves.