 Mean summer temperature is around , higher in July and August, and slightly lower in June; even during the most intense heat waves, maximum temperatures rarely exceed .Winters are quite mild; the average temperature for December, January and February is around , more or less the same temperature recorded in the Po Valley at much lower elevations.This is due to the phenomenon of inversion (a deviation from the normal atmospheric behaviour, where temperature increases with elevation) frequently observed in midwinter when subtropical high-pressure systems reach northern Italy.