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In page Ariège (department):

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Temperatures are mild in the foothills, most notably at the city of Foix (400 metres) the average is 5 °C in January and 19 °C in July. However, they decline rapidly with elevation, e.g. at l'Hospitalet-près-l'Andorre (1,430 m) it is 0 °C in January and 14 °C in July.