I've heard that the Aubrac plateau is closed to pilgrims when there is too much snow or when the weather is potentially dangerous
I can not comment on closures on the tops across the plateau.
I walked from Le Puy in April 2016. The heavens had opened the day before and a few paths that first day had minor streams ...
The day before Nasbinals, I noticed very slender red poles, about 2 metres high, beside the road.
They were about 20 metres apart.
At (or towards) the top was a white band.
There was another white band about 500 mm from the top.
To keep occupied, I made up a fictional purpose for the red poles with the two white bands.
After a while I settled on this:
1) if the snow is just below the lower white band, seek shelter.
2) if the snow is just below the upper white band, pray
3) if you can not see any poles, then ...
It is unlikely to be hot in April / May ... but you may well get rain - or maybe not. That's impossible to predict but it’s likely there will be some rain. But, one thing is certain, it is a beautiful path.
Agreed