When to prune roses depends on so many things: the weather, the location, the variety of rose and so on.
But as a rule of thumb, I generally wait till the end of July until the danger of late frosts is past. During July, you never can be quite sure of the weather.
The problem with pruning too early is that the new growth is very tender and frost can kill off all the baby leaf shoots overnight and that would be a setback for the rose bush, causing die-back and a host of other problems.
Optimally, it’s best to prune just before the roses feel the first growing surge of spring. As you know, gardening has a lot to do with feeling! Read more