The weather on the Camino del Piamonte route in July changes a lot. In the beginning, in Narbonne, it's usually sunny with temperatures between 28°C and 19°C. This is the same for Saint-André-de-Roquelongue and Lagrasse, but with a little more rain.
In Carcassonne and Montréal, it gets a bit hotter, up to 29°C, but there might be some rain. This is also the case up to Fanjeaux, with sometimes heavier rain.
In Mirepoix, it gets cooler, between 25°C and 13°C, and rain is more common.
As you go towards Pamiers and Castillon-en-Couserans, it gets a little colder, and there may be even more rain. This continues as you go through Portet d'Aspet, Juzet-d'Izaut, and Saint-Bertrand-de-Comminges, where it can get down to 10°C-12°C.
When you reach Montserié and Moulin des Baronnies, it gets warmer again, up to 27°C, but there's still some rain. The weather gets even warmer and sunnier as you approach Bagnères-de-Bigorre, Germ-sur-l'Ossouet, Lourdes, and Saint-Pé-de-Bigorre, but there might be some heavy rain showers.
At the end of the route, from Bruges to Saint-Jean-Pied-de-Port, the weather is mixed. Some days are sunny and some could be rainy or cloudy. Temperatures are between 23°C to 28°C in the day and 16°C to 17°C at night.
So, in July, the Camino del Piamonte route usually has warm, sunny weather, but also some rain.
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