Hi Reklaw,
I was about to ask your exact question, I also would like to walk Carcassonne to SJPDP in 2020. I have walked five caminos in Spain all May/June but this will be my first long walk in France. When I asked a freind who lives in Europe (I live in Australia) about walking in May on the GR78 they did offer that European winters have dragged on of late and there may still be snow in the hills. I would prefer to deal with the heat by limiting hours walking rather than walk in the rain, I also don't have a problem with cold, just rain, like most of us I guess! I would love to hear how others have found walking May/June as opposed to say September/October. Thank you. PS I'm not a new member but I'm not quite sure how to change this on my profile or even to add other walks I've done for that matter.