In Vézelay, it's typically around 7°C. The weather changes a lot and you can expect a little rain, some sun and some cloudy days.
Next, you visit Saint-Germain-des-Bois and Champlemy where the weather is pretty much the same, but a bit colder. It also tends to rain more here.
In La Charité-sur-Loire, the weather is similar but it rains even more. The same is true for your stops in Baugy and Bourges, where it might also feel colder than it is because of the rain.
When you get to Chârost and Neuvy-Pailloux, it's a little warmer and there's less rain overall. However, you still might experience a little rain.
Further south in Châteauroux and Argenton-sur-Creuse, the weather gets a bit better. It's still typically around 7°C, but you'll get some sunny and partly cloudy days, with a little rain here and there.
When you get to Gargilesse and Crozant, the weather is good with barely any rain.
However, on your visit to La Souterraine and Bénévent-l'Abbaye, you should prepare for some rain and even some rare snowfalls, even though it will be at around 6°C.
On your way through Roquefort and Mont-de-Marsan, the weather gets better with days around 10-11°C and less rain.
Finally, your last days in Ostabat will be quite rainy but the temperatures remain good, around 10°C.
In general, the whole journey includes frequently changing weather ranging from sun to rain and occasional cold temperatures. But overall it's not extreme.
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