On a normal year, winter lasts until about April 1. During winter, you can get lots of storms that last days. Then spring is about April to May. You can still get a few storms, but they don't last so long. During that time, the snowpack starts to stabilize. After May, the snowpack gets very stable and weather gets nicer. It can still be cold and windy in July, but it depends where you are on the mountain.
Now, this year I expect the snowpack to be about one month later than normal. So, yes, you can get some pleasant weather, but you can also get blown off the mountain, so to speak. The dangerously high wind that I had reported once was in late May. The snowpack might be a bigger factor than the weather.
In high camp one time, I saw an old avalanche debris path down Avalanche Gulch from 12,000 to 10,800 feet. We left camp, crossed the debris, and went to the summit. On the way back to camp along the same route, something seemed different. The whole slope had slid again, and the debris path had doubled in size, just during the five hours while we were above it.