 In winter, temperatures very often (almost every second day) drop below freezing, often reaching temperatures as low as , and snowfall is common, while the summer months see average high temperatures of .The lowest recorded temperature in Valladolid was and the hottest on 19 July 1995.The Vaccaei were a Celtic tribe, the first people with stable presence on the sector of the middle valley of the River Duero documented in historical times.