Just about every morning from Le Puy until you come out of the Cele Valley you will be faced by a good stiff climb. Nothing hysteric, but the French Confraternity allows us to check out the cariovascular system to insure all is well before beginning the day. In June you may find that a cool morning will soon turn quite warm as you climb and evenings are usually marked by a good steep descent s0 keep whatever warm clothing you choose in an easy to reach place for quick removal or wear. The Aubrac plateau can be lovely springlike or freezing - remember Baden-Powell Be Prepared!
Well said Scruffy,
If people think the climb to La Faba or O 'Cebreiro gets the heart going then Conques should be interesting.
The GR is about lovely scenery, quietness , beautiful people with home cooked meals and historic villages.
In all seriousness the weather in France will be the same as Germany, Spain, Portugal, Italy and the UK .
Maybe the golfers in the US Masters have had the same fears.....will it rain , maybe its hot...........or do they just go out and play.
Rain =Poncho , cold = Fleece , Hills= be careful and enjoy the scenery, tabac= wine , gite= food and company.
The rain will fall from the heavens , sometimes a bit heavy, sometimes drizzle and then on the other days it might get hot.
As Scruffy said the first few km each morning will get the heart rate up, there will not be a coffee break in a few km and more than not on a monday or tuesday not even a tabac/ bar open in the villages ahead.
** The only thing you need is MMDD and study the times of shops in village.
Leave the rest to mother nature.