It's worth remembering that May of 2010 was very harsh, and there was television coverage of tourists stranded in Orisson, though safely ensconced at the albergue. I was walking through the Bearn at the time: the weather was glacial. And weather was still poor late in the month when I entered Spain, with the pass being advised against by the office.
Yet it's also worth recalling that when I continued from Pamplona in late January of the following year, people coming from behind me were passing the Pyrenees without problems - in the dead of winter! Some days later it was a different story, of course. Weeks further along, I went up Iron Cross and O Cebreiro in the most perfect conditions, though it was still early spring.
So what they say about mountain weather in our Snowy Mountains must apply to Europe. Think about present conditions rather than season or time of year. These days, everything is "modelled" and projected - but mountains won't get with the program.
Hey, armed with some commonsense and some light layers...just go!
It'll be great.
Rob